Bluetooth key description
1. Power on key / telephone connection / pause / play
2. Volume plus key / next song
3. Volume down key / previous song
4. Microphone hole
5. USB charging port
Bluetooth parameter description
Frequency range: 20-20KHZ
Sensitivity: 95DM
Impedance: 32 ohms
Speaker size: 32M
Transmission distance: CLASS Ⅱ
Operating range: 10
Charging time: 2H
Standby time: 24H
Talking time: 3-5H
Battery: 160-180mA polymer lithium battery
Accessories: data cable + manual
Bluetooth protocol: 4.1
Bluetooth search name: BT-01
Bluetooth hat