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header-product Mono Portable Speaker Denver BTL-350 Black
22.49 €

Mono Portable Speaker Denver BTL-350 Black

Fast shipping
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Mono Portable Speaker Denver BTL-350 Black

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Short description

The Denver BTL-350 is a compact mono portable speaker with a sleek black design. It features a 5 W RMS rated power and a 4 cm driver for quality sound. With wireless connectivity via Bluetooth, it has a range of up to 10 meters and supports MP3 audio formats. The speaker is compatible with MicroSD cards, making it versatile for various audio needs.
Available for order: 9 pcs.
Warranty: 2 Years
SKU: 4355322
free shipment

Cheapest delivery:

Unisend LV

Pick-up points

Unisend LV

Cost

1.99 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
Thursday {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
10.11.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.61 kg)
Parcel couriers
Unisend LV / Venipak Pickup LV / Venipak Locker LV / DPD Paku skapis / Omniva LV / Latvijas Pasts pakomāts / Latvijas Pasts nodaļa
10.11.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.99 €
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Payment Methods:
Cash payment, Bank transfer, Bank cards on-line, Apple Pay, Google Pay
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Product information

Description

The Denver BTL-350 Black is a compact mono portable speaker designed for simple, on-the-go audio playback. It delivers 5 W RMS of rated power through a single 4 cm driver, providing clear sound for personal listening in small spaces. Wireless Bluetooth connectivity allows pairing with phones, tablets and other devices at ranges up to 10 metres, and the speaker also supports MP3 files from MicroSD cards for offline playback. The speaker's black finish and lightweight 0.61 kg construction make it easy to carry and integrate into a variety of environments.

Advantages

The speaker combines Bluetooth wireless streaming with direct MicroSD playback for flexible audio sources. Its 5 W RMS output and 4 cm driver provide balanced mono sound suitable for spoken word, podcasts and background music. With a range of up to 10 metres and compact dimensions, the device is convenient for travel and casual use. The single-unit design and 0.61 kg weight support easy transport and quick setup.

Suitable for

  • Listening to music and podcasts at home or in small rooms
  • Portable audio for travel or outdoor small gatherings
  • Playback from mobile devices via Bluetooth within a 10 m range
  • Offline playback from MicroSD cards containing MP3 files

Key specifications

  • Rated power: 5 W RMS
  • Driver size: 4 cm
  • Audio channels: mono (single speaker)
  • Wireless connectivity: Bluetooth, range up to 10 metres
  • Supported audio format: MP3
  • Media support: MicroSD card playback
  • Weight: 0.61 kg
  • Colour: Black

How to use

Charge the speaker according to the included instructions before first use. To play audio via Bluetooth, enable Bluetooth on your source device, scan for available devices and select the Denver BTL-350 to pair. For MicroSD playback, insert a card with MP3 files into the card slot and use the speaker controls to start playback. Adjust volume on the speaker or from the connected device. Keep the distance between the speaker and the source device within the specified 10 metre range for stable wireless performance.

Usage recommendations

For optimal performance place the speaker on a stable surface away from large obstructions and other wireless devices that may cause interference. Use MP3 files encoded at common bitrates for reliable playback from MicroSD cards, and maintain a Bluetooth connection within the recommended 10 m range for uninterrupted streaming.

Specifications

Bluetooth version: The type of bluetooth technology in the product e.g. Bluetooth Smart (v4.0).
5.0
Battery type: Description of battery supplied with the product, such battery form factor (e.g. AA/AAA).
Built-in battery
FM radio: Frequency-modulated (FM) radio gives the clearest reception of any radio band. When used with a headset, it delivers stereo-like sound.
No
Built-in microphone: Microphone that is found inside the product.
Yes
Card reader integrated: A card reader is a device that enables reading and, in some cases, writing data to and from a memory card.
Yes
Recommended usage: What the product should be used for, and how it should be used (e.g. ambient temperature).
Universal
Product type: The sub-category of the product.
Mono portable speaker
AUX in:
No
3.5 mm connector:
No
Connectivity technology: The technology that enables connectivity of the device, e.g. wired or wireless.
Wireless
RMS rated power: RMS (Root mean square) is a measure of the continuous power required by a device, in particular audio amplifiers and loudspeakers.
5 W
Number of speakers: The quantity of speakers included in/with the product.
1
All features

Logistics data

Quantity per pack:
1 pc(s)

Battery

Battery voltage: The voltage (V) of the battery.
3.7 V
Battery capacity: A measure of the charge stored by the battery. Determined by the mass of active material contained in the battery.
2400 mAh
Battery technology: The type of battery in the device, e.g. nickel–cadmium (NiCd).
Lithium

Packaging data

Package type: The type of product package e.g. box.
Gift box
Package height: The distance from the top to the bottom of the packaging.
150 mm
Package depth: The distance from the front to the back of the packaging.
70 mm
Package width: The distance from one side of the packaging to the other.
150 mm

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.
0.61 kg
Height: The measurement of the product from head to foot or from base to top.
128 mm
Depth: The distance from the front to the back of something.
60 mm
Width: The measurement or extent of something from side to side.
128 mm

Features

Product colour: The colour e.g. red, blue, green, black, white.
Black
Housing material: What the casing of the product is made of.
Acrylonitrile butadiene styrene (ABS)
Frequency range:
2402 - 2480
Wi-Fi: Popular technology that allows an electronic device to exchange data or connect to the internet wirelessly using radio waves.
No
Bluetooth version: The type of bluetooth technology in the product e.g. Bluetooth Smart (v4.0).
5.0

Power

DC input voltage:
5
Battery life (max): Maximum battery life. Mobile Mark™ (2002) is the standard often used to benchmark battery life time.
5 h
Battery type: Description of battery supplied with the product, such battery form factor (e.g. AA/AAA).
Built-in battery

Amplifier

Amplifier: Electronic device for increasing the amplitude of electrical signals, used chiefly in sound reproduction.
Built-in

Performance

FM radio: Frequency-modulated (FM) radio gives the clearest reception of any radio band. When used with a headset, it delivers stereo-like sound.
No
Hands-free mode:
Yes
Built-in microphone: Microphone that is found inside the product.
Yes
Compatible memory cards: Types of memory cards which can be used with this product.
MicroSD (TransFlash)
Card reader integrated: A card reader is a device that enables reading and, in some cases, writing data to and from a memory card.
Yes
Audio formats supported: The audio formats which this device or software can read/use e.g. MP3, MP4.
MP3
Recommended usage: What the product should be used for, and how it should be used (e.g. ambient temperature).
Universal

Design

Illumination colour: The colour of the illumination, which is the light which allows you to see the display etc. clearly.
Multi
Illumination LED:
Yes
Volume control:
Buttons
Product design: The creation of a plan or convention for the construction of an object or a system.
Rectangle
Product type: The sub-category of the product.
Mono portable speaker

Ports & interfaces

USB charging port:
Yes
AUX in:
No
USB 2.0 ports quantity: Number of USB 2.0 ports (connecting interfaces) in the device. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), USB 2.0 ports are usually black.
1
USB connector type: The type of USB connector/port that this product has.
USB Type-A
USB connectivity: The product has USB connector.
Yes
3.5 mm connector:
No
Bluetooth range:
10 m
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.
Yes
Connectivity technology: The technology that enables connectivity of the device, e.g. wired or wireless.
Wireless

Audio

RMS rated power: RMS (Root mean square) is a measure of the continuous power required by a device, in particular audio amplifiers and loudspeakers.
5 W

Loudspeakers

Driver diameter:
40 mm
Number of speakers: The quantity of speakers included in/with the product.
1
Audio output channels: An audio output channel is an electric circuit which acts as a path for a signal produced by a device. A device may have several audio output channels.
1.0

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Customer reviews

Customer questions

FAQ

How much does the Mono Portable Speaker Denver BTL-350 111151010740 cost, and is it available for purchase?

The price is 22.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 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 Thursday 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 DENVER 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 DENVER 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: bluetooth version, battery type, fm radio, built-in microphone, card reader integrated, recommended usage, product type, aux in, 3.5 mm connector, connectivity technology, rms rated power, number of speakers, 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.

Where can I download the instructions for Mono Portable Speaker Denver BTL-350 111151010740?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.
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14-Day Return Policy
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AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.