Description of bluetooth keys



1. Power on key/telephone connect/pause/play button



2. Volume up/next button



3. Volume down/up button



4. The microphones



5. USB charging port



Bluetooth parameter information



Frequency range: 20-20khz



Sensitivity: 95DM



Impedance: 32 ohms



Transmission distance: CLASS Ⅱ



Operating range: 10M



Horn size: 32mm



Charging time: 2H



Duration: 3-6h



Battery: 160-180ma polymer lithium battery



Accessories: data cable + instruction manual



Bluetooth protocol: 4.1



Bluetooth search name: bt-01

size：30*21cm     weight：125g    

Material: acrylic

Accessories: USB data cable + instruction manual

Bluetooth: 4.1

Product name: bluetooth knit cap