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Thank you for trusting our company and buying the new Headphones Bluetooth FH 300. We hope you enjoy the product. We recommend reading this manual to enjoy your device safely and with maximum performance.

Care and maintenance

  • Do not expose your Headphones Bluetooth FH 300 to impacts, dust, humidity or high temperatures.

  • Do not use neither corrosive nor abrasive cleaning products.

  • Keep the headphones clean and free of dust using a soft dry cloth.

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

  • Do not leave the battery completely discharged for a long period of time.


  • Before using the headphones, turn the volume down. Once you have done this, turn it up slowly until reaching the desired level.
  • Avoid noisy environments that force you to turn the volume really high when using your headphones.
  • Listening to loud music over a long period of time may cause your ears to get used to high volume levels, resulting in irreversible hearing loss.
  • Adjust the volume of your headphones to hear important external sounds.

Technical specifications


  • Bluetooth 5.1
  • Up to 20 m range.
  • Frequency band: 2.4 GHz
  • Maximum output signal: X.XX dBm


  • Frequency response: 40 - 20,000 Hz
  • Driver diameter: 40 mm
  • SPL: 115 ± 3 dB
  • Maximum power: 20 mW
  • Closed design
  • Type: dynamic
  • Impedance: 32 ohms


  • Length: 120 cm
  • Plug: 3.5 mm mini jack
  • Volume control


  • Sensitivity: -38 dB ± 3 dB (@1 kHz)


  • Capacity: 300 mAh / 3.7 V
  • Type: lithium polymer
  • Battery life: 22 hours [Approximate battery life. Higher volume means higher battery consumption]
  • Charging port: microUSB Type-B
  • Charging time: 3 hours


  • 3.5 mm jack audio input
  • Compatible with Android, Windows and iOS devices
  • Size: 18.5 x 20.5 x 8.5 cm
  • Weight: 189 grams

*Battery life at medium volume level. Higher volume means higher battery consumption

Product content

  • Headphones Bluetooth FH 300
  • USB charging cable
  • Audio cable
  • Pouch
  • Quick guide

Buttons and ports

  1. VOLUME + / NEXT
  2. VOLUME - / BACK

Switching on and off the device

To turn on your Headphones Bluetooth FH 300, press and hold the MULTIFUNCTION BUTTON (3) for 2 seconds. You will hear a confirmation sound and the STATUS INDICATOR (4) will glow blue. The STATUS INDICATOR (4) will keep flashing blue while your Headphones Bluetooth FH 300 are on. To turn off your Headphones Bluetooth FH 300, press and hold the MULTIFUNCTION BUTTON (3) for 2 seconds. You will hear a sound when switching off the headphones.

Charging the battery

When the battery level is below 10%, the STATUS INDICATOR (4) will flash red. You will also hear a sound to remind you to charge the battery.

The STATUS INDICATOR (4) lights up red and turns blue once the charging process is complete. To charge the battery, plug the microUSB end of the provided USB cable into your headphones' CHARGING PORT (5) and the other USB end to any device with a USB charging port providing energy (a PC, USB wall charger, car charger, etc). It takes approximately 3 hours to charge it.

Important considerations:

  • Do not store or leave your device unused or completely discharged for a long period of time.

Bluetooth pairing

Once your Headphones Bluetooth FH 300 are off, press and hold the MULTIFUNCTION BUTTON (3) for approximately 2 seconds, until the STATUS INDICATOR (4) starts flashing blue and red. At this point, your headphones and your Bluetooth device can be paired. Once "Headphones Bluetooth FH 300" appears on your devide screen, press "connect". You will hear a sound to confirm both devices have been paired correctly.

If you previously paired your Headphones Bluetooth FH 300 with a source device, they will synchronize with it automatically. If you want to pair them with a new device, press the MULTIFUNCTION BUTTON (3) twice. You will hear a confirmation sound and the lights will flash red and blue. At this point, your device can be paired once again.

Auto power off

Your Headphones Bluetooth FH 300 will automatically turn off in the following situations:

  • After 5 minutes in search mode, if they are not synchronized with any device.
  • After 30 minutes, if they are synchronized and music is paused.

Wireless playback control

Once your Headphones Bluetooth FH 300 are syncronized, you can control basic playback functions such as turn up and down the volume and skip to the next or previous song directly from your headphones.

Press VOLUME + (1) to turn up the volume and VOLUME - (2) to turn it down. You will hear a sound when reaching the maximum and minimum volume levels.

Press and hold NEXT (1) to skip to the next song. You can also press and hold BACK (2) to skip to the previous track.

Press the MULTIFUNCTION BUTTON (3) once to pause or resume playback.

  • If you are using the audio cable instead of the Bluetooth connection, you will have to control music playback from your music player and not the headphones.

Call control (hands-free function)

Once your Headphones Bluetooth FH 300 and smartphone are synchronized, you will be able to answer calls using the built-in MICROPHONE (7) while wearing your headphones.

Press the MULTIFUNCTION BUTTON (3) to answer an incoming call. If you are listening to music when you receive a call, playback will pause and you will hear an incoming call sound. You can press and hold the very same button for 2 seconds to reject an incoming call.

Press the MULTIFUNCTION BUTTON (3) again to end a call. Playback will resume from the point when the music stopped.

Audio input

If you don't want to use the Bluetooth connection, you can also connect your Headphones Bluetooth FH 300 to your music player using the provided audio cable. You don't need to switch on your headphones if you want to use the audio cable.

To enable this mode, simply plug one cable end into the AUDIO-IN (6) and the other end into your music player.

  • If you are using the audio cable instead of the Bluetooth connection, you will have to control music playback from your music player and not the headphones.



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 unauthorised person.

The special 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.


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

© 2021 by Energy Sistem Technology, S.A. All rights reserved.

Declaration of conformity

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

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

  • Description: wireless headphones
  • Brand: Energy Sistem
  • Model: Headphones Bluetooth FH 300
  • Manufacturer: Energy Sistem Technology, S.A.
  • Manufacturing country: China

referred to in this declaration is in compliance with the essential norms and standards

ETSI EN301 489-1 V2.2.3 (2019-11)
ETSI EN301 489-17 V3.2.4 (2020-09)
ETSI EN300 328 V2.2.2 (2019-07)

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 April 2021

Miguel Ángel Aragüez García
Innovation and Technology Director