1.Bluetooth specifications��Bluetooth V5.0 blue trum 5335B 5335B 2. Charging voltage: DC5V; charging time is about 15 minutes (fast charging) 3.Battery capacity: 150mAh 4. Talk music time: 20 hours; standby time 200 hours 5. Size: 66 �� 17 �� 25mm; Weight: 10g 6.Voice prompt switch��When not connected, double-click the multi-function button and there will be a beep
