Product information:

Model: YMMKF001
Microphone directivity: Cardioid
Speaker: 5W/φ45mm
Bluetooth version: 4.2
Connection distance:7 meters (no obstacle and strong interference)
Battery: 3.7V/850mAh
Charging input: DC 5V/0.5A
Charging time: About 1.5 hours
Use time: About 4 hours
Interface: USB Type-C
Size: φ54mmX 200mm