Product information: Bluetooth version: 5.2 Supported protocols: HSP/HFP/A2DP/AVRCP Charging interface: Type-C Input current: DC 5V Output current: 3.7V/50mAh Horn: 13mm high quality moving coil Frequency response range: 20Hz-20000Hz Headphone battery: 30mAh *2 Charging box battery capacity: polymer 200mAh with protective plate Music playback: , about 6 hours of single playback, about 22 hours with charging box Talk time: 5-6 hours Charging time: 60 minutes Wireless working range: ≤15M (no obstacles) Size Information: Packing list: Headphones*2 Charging box*1 Type-C cable*1 Manual*1 Packaging*1 Product Image: