Energy Sistem Style 4 True Wireless Bluetooth Earbuds Stone (453504)

Touch control and voice assistant to drive playback without touching the phone. Five hours of listening per charge, 25 h in total with the case, and an app that personalises the equaliser.

Touch control of playback and volume
Google and Siri voice assistant
Up to 5 h of listening per charge
25 h in total with the charging case
ESmart Connect app with equaliser
Find my earbuds function to locate a mislaid earbud
10 mm dynamic drivers
Built-in microphone and hands-free calls
Wireless range up to 20 m
Case rechargeable over USB-C in 1 h 30
Weight 42 g with the case

Ref.: 453504

Energy Sistem Style 4 True Wireless Bluetooth Earbuds Stone (453504) — image 1

Energy Sistem Style 4 True Wireless Bluetooth Earbuds Stone (453504) — image 2

Energy Sistem Style 4 True Wireless Bluetooth Earbuds Stone (453504) — image 3

Energy Sistem Style 4 True Wireless Bluetooth Earbuds Stone (453504) — image 4

Energy Sistem Style 4 True Wireless Bluetooth Earbuds Stone (453504) — image 5

Energy Sistem Style 4 True Wireless Bluetooth Earbuds Stone (453504) — image 6

385,00 DHincl. VAT

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Product overview

Energy Sistem Style 4 True Wireless earbuds in Stone: a compact, ergonomic design that adapts to your ear for wireless listening, with an app that lets you customise everything.
Battery life: up to 5 hours of listening per charge and 25 hours in total with the light, compact charging case, which recharges over USB-C in 1 h 30 min.
App: the ESmart Connect app with a sound equaliser, a Find my earbuds feature to locate lost earbuds, and OTA updates.
Controls: touch controls for playback and volume, plus a built-in voice assistant.
Also: Bluetooth 5.3 with up to 20 m range, AAC and SBC codecs, 10 mm dynamic drivers, built-in microphone for hands-free calls, automatic pairing, 42 g.

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Technical specifications

Technical specifications
Customisation software	ESmart Connect
Headset frequency response	20 Hz to 20 kHz
Microphone frequency response	100 Hz to 10 kHz
Cable length	None (wireless earbuds)
Wireless technology	Bluetooth 5.3, class 2
Microphone type	Built-in microphone
Microphone sensitivity	-42 dB ±3 dB at 1 kHz
Box contents	Earbuds, charging case, USB-C cable, quick start guide
Product colour	Stone
Wearing style	Semi-in-ear (bud style)
Type	Earbuds
Connector	Bluetooth
Bluetooth profiles	HSP, HFP, A2DP, AVRCP
Bluetooth codecs	SBC and AAC
Headphone form factor	In-ear
Listening	Stereo (both ears)

Technical specifications (continued)
Noise cancellation	No noise reduction
Microphone	Built-in microphone
Wireless battery life	Up to 15 h
Headphone use	Music & mobility
Headset connection	Bluetooth only
Adapter or receiver included	None
Headset charging	Charging case via USB-C
Charging case	Included
Wireless range	Up to 20 m
Listening time	Up to 5 h
Total battery life with case	Up to 5 h per charge, plus 20 h with the case
Charging time	1.5 h for the earbuds, 1.5 h for the case
Driver size	10 mm, dynamic driver
Headset controls	Google or Siri voice assistant, hands-free function
Warranty	1 year

Specific references

EAN	8432426453504

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Frequently asked questions about this product

How do you control the Style 4 without touching your phone?

By touch control on the earbuds: play, pause and volume are adjusted with one finger. The voice assistant, Google or Siri, is triggered the same way, and the built-in microphone handles hands-free calls.

How many hours of listening before you need to plug in again?

5 h per charge in the earbuds and another 20 h in the case, for 25 h in total. The case charges fully in 1 h 30 min over USB-C: one charge in the evening is enough to cover several days of commuting.

What can you adjust in the ESmart Connect app?

The sound equaliser, the touch control gestures, and updates to the firmware. It also gives access to Find my earbuds, the feature that helps you find a misplaced earbud — handy on the day one of them slips under a seat.

How far can you move away from your phone?

Up to 20 m, with no obstacles between the two. Supported codecs are AAC and SBC, and the device can be a Mac, a Windows PC, a smartphone, a tablet or a TV with Bluetooth.

Do these earbuds have active noise cancellation?

No. No electronics cancel out the outside noise: what you hear from the street depends solely on how the earbud sits in your ear. For extended use on public transport, a model with active noise cancellation remains more comfortable.

Is the sound in sync when watching a video?

The stated latency goes down to 100 ms, a low figure for Bluetooth. At that level, the lag between lips and sound is no longer noticeable on a video: these earbuds are therefore suitable for watching a series on the move.

How good are the 10 mm drivers?

10 mm in diameter, dynamic, with a response of 20 Hz to 20 kHz: a large diaphragm moves more air, which gives body to the bass. That is what sets this format apart from smaller earbuds, which are often weaker at the low end.

Is the set easy to carry around?

42 g with the case, in a format described as light and compact enough to fit in a small backpack compartment. The earbuds themselves have an ergonomic design shaped to fit the ear.

Are these Energy Sistem earbuds new and under warranty?

Yes, new and genuine, with the invoice serving as the warranty document for 1 year. The reference for this Stone colour is 453504, with EAN code 8432426453504: these are the identifiers that identify the product for any warranty claim.

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Available alternatives

Models available from 229 DH incl. VAT, in a similar range.

Energy Sistem
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- 23 h of listening in total with the case
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- 23 h of listening in total with the case
- ENC noise-cancelling microphone for calls
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Designed to let street sounds through, they avoid cutting you off in the city as at the gym. Up to 23 h of listening in total with the charging case, and IPX4 resistance to sweat.
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Energy Sistem Style 4 True Wireless Bluetooth Earbuds Stone (453504)

Available right now

Product overview

Available alternatives

Technical specifications

Specific references

Customer reviews

Frequently asked questions about this product

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Suggestions

Available right now

Available alternatives

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