Headset Sennheiser CX 300S

Name: Headset Sennheiser CX 300S 508594
Brand: Sennheiser
SKU: 4257453
Price: 41.99 EUR
Availability: InStock

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Offer for legal entity, cashless payment. Why is an item available only for a legal entity?
This is due to long delivery times and limited product warranties.

Short description

The Sennheiser CX 300S is a wired in-ear headset designed for calls and music. It features high-quality sound with deep bass and clear treble. The ergonomic design ensures a comfortable fit for extended use. With a built-in microphone, it allows for hands-free calls. The headset is compatible with various devices and comes in a sleek white finish.

Available at price 41.99 €: 102 pcs.

Total available for order: 103 pcs.

Warranty: 2 Years

SKU: 4257453

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Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.79 €

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Customer service center

2b. Kengaraga str., Riga, Latvia, LV-1063

24.08.2026 {{selectedOffer.officeDeliveryString}}

free

Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!

27.08.2026 {{selectedOffer.courierDeliveryString}}

From 9.89 € (Weight: 12.00 kg)

Parcel couriers

Unisend LV / Venipak Locker LV / Latvijas Pasts pakomāts / DPD Paku skapis / Omniva LV / Latvijas Pasts nodaļa

27.08.2026 {{selectedOffer.parcelStationDeliveryString}}

From 1.79 €

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Payment Methods:

Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay

Available for private customers at price 46.99 €: 1 pcs.

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Product information

Description

Boost your sound with the Sennheiser CX 300S wired in-ear headset. It delivers detailed sound reproduction with enhanced bass response thanks to Sennheiser’s transducer technology, while the ergonomic In-Ear design reduces ambient noise for focused listening. The headset includes a built-in microphone and smart remote for call and music control and comes with four sizes of ear adapters for a personalized fit.

Advantages

The headset features a built-in microphone and remote that let you manage calls and music without reaching for your device. Its ergonomic in-ear design provides effective ambient noise isolation for undisturbed listening. The cable is tough and tangle-resistant to support durable everyday use.

Suitable for

Listening to music with enhanced bass and clear treble
Hands-free calls on smartphones and other devices
Commuting and travel where ambient noise reduction is beneficial
Everyday use with a durable, tangle-free cable

Key specifications

Impedance: 18 Ω
Sensitivity: 118 dB
Connector: 3.5 mm jack
Cable length: 1.2 m
Weight: 12 g
Ear adapter sizes: XS, S, M, L
Frequency sensitivity: 44 dB V/Pa
Connectivity: Wired
Ear coupling: Intraaural (in-ear)
Colour: White

How to use

Insert the ear adapters that best fit your ear canal (XS, S, M or L) to ensure a secure seal and optimal sound. Plug the 3.5 mm jack into a compatible device. Use the inline remote to play/pause music or answer and end calls; speak into the built-in microphone for hands-free communication. Store the earphones in the supplied pouch when not in use to protect them from damage.

Usage recommendations

For best sound and noise isolation, select the ear adapter that creates a comfortable yet snug seal. Keep the cable untangled and avoid excessive bending near the connector to prolong product life. Do not expose the headset to moisture or extreme temperatures.

Specifications

Ear coupling: Ear coupling describes the way in which headphones or earphones stay attached to, or inside, the ear. There are three common types of ear coupling: circumaural, supra-aural and intra-aural. Circumaural headphones enclose your ears with large pads that suppress external noise. Supra-aural headphones are typically more lightweight and sit on top of the ears with small pads. Intra-aural headphones come in two basic designs and neither style sits on the head itself. The first are ear buds, which sit just outside of the ear canal, on top of your ear lobes. The second type is actually inserted directly into the ear canal and offers some external noise suppression.: Intraaural
Connectivity technology: The technology that enables connectivity of the device, e.g. wired or wireless.: Wired
Headset type: A headset is headphones combined with a microphone, or one headphone with a microphone. Headsets provide the equivalent functionality of a telephone handset but with hands-free operation. Types of headsets include single earpiece (monaural) and double earpiece.: Monaural
Recommended usage: What the product should be used for, and how it should be used (e.g. ambient temperature).: Calls/Music
Product type: The sub-category of the product.: Headset
Product colour: The colour e.g. red, blue, green, black, white.: White
Wearing style: The way in which the device is worn.: In-ear

All features

Other features

2.5 mm connector:: No

Supplier features

Material: The material from which a thing is or can be made e.g. wood, plastic.: Silicone, Rubber

Packaging content

Pouch:: Yes
Accessories included in set:: 4 sizes silicone eartips

Weight & dimensions

Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.: 12 kg

Microphone

Noise-canceling:: Yes
Microphone sensitivity:: 44 dB
Microphone frequency: The range of frequencies (low to high sounds) that the microphone can pick up (detect).: 100 - 10000

Headphones

Total Harmonic Distortion (THD): Total harmonic distortion is a measure of non-linear harmonic distortion and is given in %. Non-linear harmonic distortions are signals which were not present in the original before the signal was converted by the headphones. These unwanted signals are caused by the diaphragm, whose movements do not precisely move in time with the electric signals that cause it to move. Unfortunately, this is a feature of all electroacoustic transducers. Although it cannot be completely eliminated, suitable steps can be taken to minimise it. However, the user is not interested in why this distortion takes place but in how great the level of distortion must be for it to become perceptible. According to the findings of several research projects, a total harmonic distortion of 1% in the frequency range of 100 to 2000 Hz is imperceptible. Below 100 Hz, the perceptibility threshold lies at 10%.: 0.5 %
Headphone sensitivity:: 118 dB
Impedance: The effective resistance of an electric circuit or component to alternating current, arising from the combined effects of ohmic resistance and reactance.: 18 Ω
Headphone frequency: The range of frequencies (low to high sounds) that the headphones can produce.: 17 - 21000
Acoustic system:: Closed
Ear coupling: Ear coupling describes the way in which headphones or earphones stay attached to, or inside, the ear. There are three common types of ear coupling: circumaural, supra-aural and intra-aural. Circumaural headphones enclose your ears with large pads that suppress external noise. Supra-aural headphones are typically more lightweight and sit on top of the ears with small pads. Intra-aural headphones come in two basic designs and neither style sits on the head itself. The first are ear buds, which sit just outside of the ear canal, on top of your ear lobes. The second type is actually inserted directly into the ear canal and offers some external noise suppression.: Intraaural

Ports & interfaces

RF connectivity:: No
Microphone in: The socket where a microphone is connected to the device.: Yes
Bluetooth: Bluetooth is a low-power radio technology developed to replace the cables and wires currently used to link or connect electronic devices such as personal computers, printers, and a wide variety of handheld devices including mobile phones. Because it uses radio-wave connectivity, a Bluetooth-enabled device has a constant, established connection to whatever browser it uses. This saves the user the trouble of logging on to check for emails or news updates, for example.: No
USB connectivity: The product has USB connector.: No
6.35 mm connector:: No
3.5 mm connector:: Yes
Connectivity technology: The technology that enables connectivity of the device, e.g. wired or wireless.: Wired

Performance

Sound pressure level (max):: 118 dB
Cable length: How long the cable is.: 1.2 m
Volume control:: Buttons
Product colour: The colour e.g. red, blue, green, black, white.: White
Headset type: A headset is headphones combined with a microphone, or one headphone with a microphone. Headsets provide the equivalent functionality of a telephone handset but with hands-free operation. Types of headsets include single earpiece (monaural) and double earpiece.: Monaural
Recommended usage: What the product should be used for, and how it should be used (e.g. ambient temperature).: Calls/Music
Wearing style: The way in which the device is worn.: In-ear
Product type: The sub-category of the product.: Headset

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Warehouse	Stock	Delivery to the store	Store Price
WH337	1	05.08.2026 Best delivery	46.99 €

Available only for legal entities
Warehouse	Stock	Delivery to the store	Store Price
WH109	102	24.08.2026	41.99 €

46.99 €

Stock: 1

Delivery Date: 05.08.2026 Best delivery

Warehouse: WH337

Available only for legal entities

41.99 €

Stock: 102

Delivery Date: 24.08.2026

Warehouse: WH109

Customer reviews

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Customer questions

FAQ

How much does the Headset Sennheiser CX 300S cost, and is it available for purchase?

The price is 41.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 103 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 24.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All Sennheiser products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Sennheiser service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: ear coupling, connectivity technology, headset type, recommended usage, product type, product colour, wearing style, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

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Headset Sennheiser CX 300S

Short description

Product information

Description

Advantages

Suitable for

Key specifications

How to use

Usage recommendations

Specifications

Other features

Supplier features

Packaging content

Weight & dimensions

Microphone

Headphones

Ports & interfaces

Performance

Description

Similar products

Product comparison

Customer reviews

Customer questions

How much does the Headset Sennheiser CX 300S cost, and is it available for purchase?

If I order this product today, when will I receive my order?

What payment options are available?

Can this product be purchased for a company (with VAT)?

What is the warranty period?

Can the product be returned after purchase?

Where should I contact for warranty service?

How can I tell if this product suits my needs?