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Thank you for trusting our company and buying the new Speaker FS1. We hope you enjoy the product.

Before you start using your Speaker FS1 we strongly recommend reading this manual to get used to it.

Care and maintenance

  • Do not expose the device to humidity or high temperatures.

  • Do not use neither corrosive nor abrasive cleaning products.

  • Do not disassemble the device. All repair works should be carried out exclusively by qualified staff of Energy Sistem Technology, S.A.

  • Turn off the device when you are not using it. Do not let it completely discharged for a long time.

Technical specifications


  • System: 2.0
  • Power: 10 W
  • Speakers: 2 full range speakers of 40 mm
  • Passive radiator: two membranes
  • Frequency response: 100 Hz ~ 18 KHz
  • S/N ratio: > 60 dB


  • Bluetooth 5.0, class II. Up to 20 m distance range
  • Supported Bluetooh protocols: HSP / HFP / A2DP / AVRCP
  • Frequency band: 2.4 GHz (2.402 - 2.480 GHz)
  • Maximum output power: < 20 dBm
  • Hands-free function. Microphone sensitivity: -42 dB
  • TWS technology (True Wireless Stereo)


  • Urban box 2
  • Speaker FS1


  • 3.5 mm mini jack stereo audio-in (AUX)


  • USB and microSD decoder: reads MP3 files stored on external units (up to 64 GB) with FAT/ FAT32 file system.


  • Capacity: 1200 mAh
  • Type: Li-Po
  • Battery life: 12 hours*
  • Charging port: microUSB
  • Charging time: 3 hours

*The battery life depends on the selected volume level and the type of music you play.

Product content

  • Speaker FS1
  • USB cable
  • Quick guide
  • Strap

General overview

1. On/ Off/ Play/ Pause/ Call control
2. Volume +/ Next
3. Volume -/ Back
4. Change function/ TWS
5. Hands-free microphone
6. Function and charge indicator

7. MicroSD slot
8. Charging port
9. Auxiliary audio input
10. USB port


Main functions

Switching on and off the device

Press and hold On/ Off (1) for 2 seconds to switch on and off the device. You will hear a confirmation sound when switching on the device. The Function indicator (6) will keep flashing blue while the device is on.

Press and hold On/ Off (1) once again to switch off your device. You will hear a confirmation sound. At this point, the Function indicator (6) switches off.

Important:* Press the hidden reset button located inside the Auxiliary audio input (9)* to force the device to shut down.

Playback control

You can manage playback from the speaker itself. Press repeatedly Volume +/ Next (2) or Volume -/ Back (3) to adjust the volume. Press and hold the very same buttons to switch to the next/ previous track. You will hear a warning sound when reaching the maximum and minimum volume levels.

Press Play/ Pause (1) to pause or resume playback.

Important: Bear in mind that you can only manage playback from the connected music player while using the Auxiliary audio input (9) .

Important: Find all information about playback control while TWS mode is enabled in the TWS section.

Charging the battery

When the battery level is below 10%, you will hear a sound to remind you to charge it. Plug the mini USB end of the provided USB cable into the Charging port (8) and the other USB end to any device with a 5 V USB charging port (PC, USB wall charger, car charger, etc.) to charge the battery. The Charge indicator (6) lights up red and switches off once the charging process has been completed. The charging time is approximately 3 hours.


  • Use a 5 V 2 A AC/DC power adapter.
  • Do not leave your Speaker FS1 completely discharged for a long time.

Bluetooth connection

Press Change function (4) until you find Bluetooth mode while your Speaker FS1 is on. At this point, you will be able to pair the speaker with your smartphone or tablet.

Once your Speaker FS1 appears on your smartphone or tablet screen, press "connect". The devices will be connected immediately and without codes. You will hear a sound that confirms both devices have been paired correctly.

At this point, you will be able to start playback on your smartphone or tablet. The Bluetooth wireless connection range is up to 10 metres.

Your Speaker FS1 connects to the last paired device automatically when you switch it on once again, provided that the Bluetooth connection on your smartphone or tablet is enabled.

Important: Your Speaker FS1 turns off automatically after 5 minutes with Bluetooth® mode enabled, if not paired with any device.

Call control (Hands-free function)

You can manage your calls from the speaker itself. To do so, pair the Speaker FS1 with your smartphone.

When receiving a call, the song you are listening to stops and the ringing tone sounds instead. Press Call control (1) to answer an incoming call. Press it once again to hang up.

Important: If you receive an incoming call while TWS mode is enabled, you will only hear the voice of the person who calls through the speaker connected to your smartphone (left channel).*

TWS (True Wireless Stereo)

This option makes it possible to wirelessly pair another Speaker FS1 to get twice as much power and create a stereo sound system made up of two different channels: left and right.

To use this function for the first time, turn on your two Speaker FS1 and press and hold Change Function/ TWS (4) on both speakers for 2 seconds. A few seconds later you will hear a sound to confirm that both devices have been successfully synchronized. Enable then Bluetooth on your source device and connect your Speaker FS1.

From that moment on, you will be able to play music via Bluetooth. You will hear the music through both speakers at the same time. One speaker will be assigned the left channel (L) and the other one the right channel (R).

The next time you turn on both speakers, they will pair with one another automatically.

If you want to disable this function, press and hold Change function/ TWS (4) on any of them. Both speakers will be disconnected. Press the very same button if you want to reconnect them.

Switch to the next/ previous track and adjust the volume pressing the corresponding buttons on any of the speakers while TWS mode is enabled. If you turn up the volume on any of the speakers, you will be turning up the volume on both of them at the same time.

Important: This is only possible if Bluetooth mode is enabled. In all other playback modes (USB, microSD, or line-in) a TWS connection is not possible.

Auxiliary audio input

Your Speaker FS1 also features an Auxiliary audio input (9) to connect your external devices using an audio cable.

Important: It is not possible to manage music playback from the speaker while using this mode. You will have to use the music player instead.

MicroSD/USB player

The device plays .mp3 and .wav files from microSD cards (up to 64 GB). The contents play automatically a few seconds after inserting the microSD card or USB stick.

If you turn off the speaker or remove the storage unit, the internal memory will save the moment where you paused playback. If you connect the same removable storage unit once again, music playback will resume and the last song you listened to will be then played.

Press and hold Volume +/ Next (2) or Volume -/ Back (3) to move to the next or previous song.

Press and hold Change function (4) to enable shuffle mode. You will hear a sound to confirm this mode has been enabled. Shuffle mode will be disabled automatically when switching off the speaker.

The root folders and files of your external cards or sticks will be read in chronological order and the songs included in your folders in alphabetical order.

Here you have a diagram of the reading order:


Battery life

The battery life of your Speaker FS1 depends on the selected volume level and the type of music. Please take a look at this comparative table to find out more about the approximate battery life of your device:

BLUETOOTH 12 hours 6 hours
USB / SD 14 hours 7 hours
FM RADIO 4 hours 2 hours
AUXILIARY 16 hours 8 hours


Press the hidden reset button located inside the Auxiliary audio input (9) to force the device to shut down.

Note: Avoid using metallic objects when performing the reset.



Energy Sistem Technology, S.A. is liable for any lack of conformity for 36 months from the date the goods are purchased. Batteries are excluded from the 36-month warranty, having a warranty period of 24 months.

This warranty covers defects in workmanship or materials and does not cover product failures due to accidents, misuse or alteration made by an unauthorized person.

The extended 36-month warranty is valid for the European Union. For other countries please refer to your specific legislation or your local distributor.

Warranty procedure

Please visit and select your product to view the FAQ (Frequently Asked Questions), user manual, quick guide, drivers and updates available as well as to submit a query to our Technical Support or manage the warranty.

You may also contact the distributor that sold the product by presenting the purchase receipt or invoice.

Important: This warranty does not cover any damage or loss of data stored on warranty products. Therefore, Energy Sistem's Technical Support will not assume any loss of the above-mentioned information. In this respect we recommend to make a backup of your data and remove any personal data from the product internal memory before you send it or send it only with the original data. Specifications are subject to change without notice.

Trademarks. All company, brand and product names are trademarks or registered trademarks of their respective companies. Specifications are subject to change without notice.

©2020 by Energy Sistem Technology, S.A. All rights reserved.

Declaration of conformity

Issuer's name: Energy Sistem Technology, S.A. CIF: A53107488
Address: C/ Calpe, 1 - 03509 Finestrat, Alicante (Spain)
Tel: +34 966 830 324

We declare under our sole and exclusive responsibility that the product:

Description: Portable wireless speaker
Brand: Energy Sistem
Model: Speaker FS1
Manufacturer: Energy Sistem Technology, S.A.
Manufacturing country: China

referred to in this declaration complies with the essential norms and standards

EN 62368-1:2014+A11:2017
EN 62479:2010
ETSI EN 301 489-1 V2.2.3 (2019-11)
ETSI EN 301 489-17 V3.2.3 (2020-07)
ETSI EN 301 489-52 V1.1.0 (2016-11)
ETSI EN 300 328 V2.2.2 (2019-07)
ETSI EN 303 345 V1.1.7 (2017-03)

in conformity with the provisions of the Directive 2014/53/EU of the European Parliament and of the Council of 16th April 2014.

Finestrat, 1st November 2020

Miguel Ángel Aragüez García
Innovation and Technology Director