Bluetooth version: V2.1 + EDR
Bluetooth operating frequency: 2.4GHZ
Connection distance: 0 ~ 10M
Effective distance calls Mic: 0 ~ 1M
Charge voltage: DC 5V
Built-in lithium battery capacity: 400mAh
Standby current: 25mA
Standby time: 16H
Operating ambient temperature: -10 ~ 70 degrees
Storage temperature: -20 ~ 80 degrees