E37 Gratified business wireless headset

1. Wireless specification: Wireless V4.2 JL AC6973， support protocol Headset Hands-free A2DP Avrcp 2. Charging voltage DC5V; charging time: 2.5 hours; call/music time: 10 hours; standby time: 340 hours 3. Battery capacity: 180mAH 4. Size: L61 × W16 × H21mm; Weight: 11g 5.Voice prompt switch：Only supports English, does not support switching