LF-18 Smart Wireless Bone Conduction bluetooth Headset Headphones

LF-18 Smart Wireless Bone Conduction bluetooth Headset Headphones BONE CONDUCTION HEADPHONES Specification Model LF-18 Speaker Type Bone conduction technology speaker, 1w dual speaker Battery 260mAh Polymer battery Mic Antiinterference microphones, 42DB Effective range 10m (33feets) Mono/Stereo Stereo Blue tooth Version CSR8635)4.1 Weight 60g bluetooth Class(1/II) II BQB included(Y/N): No bluetooth Profile a2dp/HFP,HSP,AVRCP,GAVDP,AVDTP Receiving Sensitivity 88dBm Impedance 8 Frequency range 2020KHz Charging MICRO USB port and need 2h TF card No System language English Prompt tone is English Indicator light Status Red light flashing rapidly: Lack of Power Red Light on: charging Blue Light on: full charged Blue and red lights flashing: Matching Blue light double flash slowly: fail to match, maybe the device is power off, or the distance of both is over 10m(30feets) Blue light flash slowly: Matched/dialing/playing audio. Blue light flashing rapidly: call coming Operation Headphone control Prompt tone Answer call Click the call button buzzing once Ending cal Click the call button buzzing once Reject call Long press call button for 1s buzzing once Redial last call double click call button buzzing twice Voice control long press call button buzzing once Volume control click the vol button "+""" have buzzing at the volume limit Play/Pause phone music Press Play button no Power on put switch on "on" prompt tone "Power on" Power off put switch on "off" prompt tone "Power off" BT disconnecting prompt tone "Dingdong" BT connected prompt tone "paired" Match again/manual matching Long press play button for 3s prompt tone "Ready to pair" Low Power buzzing once Up/down Long press "+""" for 2s No Matching Method: 1.Put bluetooth headphone switch at "ON" 2.Search bluetooth device on your phone or other digital products, then choose it. If it is 1st time to match, it will automatically enter the match mode once the bt headphone turning on. And the LED lights will alternate flash between blue and red. If it was connected with last device, it will automatically match in 10s. And the blue light is on. If it matches other device or rematch, press"play"button for 3s, the bluetooth headphone will enter manually matching mode. blue and red light flash alternatively. Notes: 1. If the connecting distance is beyond the bt headphone effective range(10m or 33feets) the headphone will disconnect with the device. Once in effective range again, they will connect again automatically. But if the disconnecting continues for long time(over 3mins) you maybe need to double click "Play" button to connect again. 2. If turn off the device, bluetooth headphone will disconnect. When turn on the device, only need to double click"Play"button to connect