# Headphones Energy Sistem Style 4

**URL:** https://aio.lv/en/product--energy-sistem-453504--5969328
**Data updated:** 2025-12-02 15:25 (EET)
**Category:** Headphones
**Manufacturer:** energy sistem
**Manufacturer code:** 453504
**EAN:** 8432426453504
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 35.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 29.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--energy-sistem-453504--5969328

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The Energy Sistem Style 4 Headphones offer True Wireless Stereo (TWS) technology for seamless connectivity. With a frequency range of 20 - 20000 Hz, they deliver clear sound for calls and music. Weighing only 42 g, these grey earbuds provide comfort and portability. Enjoy a wireless range of up to 20 m and USB Type-C charging for convenience.

## Long description

True Wireless Style 4 earphones provide portable wireless audio with a compact ergonomic design and a charging case that extends total battery life up to 25 hours (5 hours per earphone plus 20 hours from the case). Use the ESmart Connect app to customise sound, find misplaced earbuds and receive OTA updates. Built-in Voice Assistant and touch controls allow hands-free operation while Bluetooth® 5.1 ensures stable connectivity and automatic synchronisation between earbuds.
Advantages
Compact, lightweight design for comfortable, long-wear use and easy storage in a pocket or bag. Long combined battery life with fast on-the-go recharging in the included case. Customisable audio and settings via the ESmart Connect app, including sound equalisation and Find my earbuds. Voice Assistant support, touch controls and hands-free calling enabled by Bluetooth® 5.1 and True Wireless automatic synchronisation.
Key specifications
 Model: True Wireless Style 4
 Battery life: up to 5 hours per earphone; up to 25 hours total with charging case (5 h + 20 h)
 Connectivity: Bluetooth® 5.1; True Wireless with automatic synchronisation
 Controls: Touch Control
 App: ESmart Connect (sound equalisation, Find my earbuds, OTA updates)
 Features: Voice Assistant support, hands-free function
 Design: Compact, ergonomic, lightweight with charging case for portable recharging
How to use
Charge both earbuds in the supplied case before first use. Pair the earbuds to your device using Bluetooth® 5.1 and follow on-screen prompts; the earbuds synchronise automatically. Install the ESmart Connect app to adjust equaliser settings, enable Find my earbuds and apply OTA updates. Use touch controls on the earbuds to play/pause, skip tracks, answer calls and activate the Voice Assistant. Keep the earbuds in the case when not in use to recharge and extend battery life.
Recommendations
For best performance, ensure the charging case is regularly charged and keep the ESmart Connect app updated. Use the Find my earbuds feature when you misplace an earbud and adjust the equaliser to match your preferred sound profile.

## Specifications

### Headphones

| Feature | Value |
|---|---|
| Headphone frequency | 20 - 20000 |
| Driver unit | 10 mm |
| Ear coupling | Intraaural |
| Driver type | Dynamic |

### Ports & interfaces

| Feature | Value |
|---|---|
| Connectivity technology | True Wireless Stereo (TWS) |
| Bluetooth version | 5.1 |
| Wireless range | 20 m |
| Frequency band | 2.4 |
| Bluetooth | Yes |
| Bluetooth profiles | AVRCP, A2DP, HFP, HSP, SBC |
| USB connector | USB Type-C |

### Performance

| Feature | Value |
|---|---|
| LED indicators | Status |
| Product colour | Grey |
| Volume control | Button |
| Control type | Touch, Buttons |
| Headset type | Binaural |
| Wearing style | In-ear |
| Recommended usage | Calls/Music |
| Product type | Headphones |
| Music playback | Yes |
| Works with the Google Assistant | Yes |
| Works with Apple Siri | Yes |

### Other features

| Feature | Value |
|---|---|
| Continuous audio playback time | 5 h |

### Microphone

| Feature | Value |
|---|---|
| Microphone frequency | 100 - 10000 |
| Microphone sensitivity | -42 dB |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.042 kg |
| Height | 30 mm |
| Width | 65 mm |
| Depth | 35 mm |

### Battery

| Feature | Value |
|---|---|
| Battery technology | Lithium Polymer (LiPo) |
| Battery type | Built-in battery |
| Battery recharge time | 1.5 h |
| Battery voltage | 3.7 V |
| Left earpiece battery capacity | 30 mAh |
| Right earpiece battery capacity | 30 mAh |
| Continuous audio playback time (with charging case) | 25 h |
| Battery recharge time (charging case) | 1.5 h |
| Battery technology (charging case) | Lithium Polymer (LiPo) |
| Battery capacity (charging case) | 400 mAh |
| Input voltage (charging case) | 3.7 V |

### Packaging data

| Feature | Value |
|---|---|
| Package type | Box |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | USB Type-C |
| Quick start guide | Yes |
| Charging case | Yes |
| Charging case capacity | 400 mAh |
| Charging case type | Wired |
| Charging case connector type | USB Type-C |

### Indication

| Feature | Value |
|---|---|
| Battery charge indicator | Yes |

## FAQ

### How much does the Headphones Energy Sistem Style 4 cost, and is it available for purchase?

The price is 35.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 16.07.2026 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: 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 energy sistem 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 energy sistem 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. More information about warranty service: https://aio.lv/en/warranty

### 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, weight, 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.

### Where can I download the instructions for Headphones Energy Sistem Style 4?

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.

## Image

https://aio.lv/img/cache/product/5969328/62284064_large.webp