Справочник Пользователя для Desma Co. Ltd. BT15X

To terminate the Bluetooth connection between the headset and your 

phone, turn the headset off. 

Adjust the volume up during conversation, press volume up. 

Adjust the volume down during conversation, press volume down. 

When the minimum/maximum volume is reached, a beep sound will 

occur. 

The paired Bluetooth mobile phone has to support Bluetooth HSP or 

HFP.  

The actual hands-free functions and operations may vary due to the 

different paired mobile phone models and Bluetooth settings.   

If the headset is distant from the mobile phone, or if there are some 

metal obstructions in-between, the hands-free communication may be 

interrupted or interfered.   

 

The headset contains rechargeable Lithium battery. To reduce the risk 

of fire or burns, do not disassemble, crush, puncture, short external 

contacts, or dispose of in fire or water.   

  

To reduce the risk of personal injury, electrical shock, fire or damage 

 

to the equipments, please follow all instruction below：   

Do not expose the headset to rain or water.   

Dot not install, place or use the headset near any source of heat such 

as a stove, radiator, oven, toaster, coffee maker or other apparatus 

(including microwave oven) that gives off heat.   

Always use the original USB Charging Cable included in the retail 

box to charge the headset. Using any incorrect power supply device 

will cause damage to the headset and void the warranty. 

Power On 

Blue 

Twinkle 4 times 

Power Off 

Blue 

Twinkle 3 times 

Pairing 

Blue & Red Blue and Red alternately

Stand By 

Blue 

Every 5 seconds 

Connect 

Blue 

Every 1 seconds 

Power Low 

Red 

Every 2 seconds 

Recharging 

 

 

Red

Light

Recharging Complete

X 

All LED off