C7 Transparent Crystal Wireless Speaker style:High match while its whisper-quiet motor ensures

while its whisper-quiet motor ensures you can train anytime without disturbing others

A digital voltage display shows real-time car battery status for added convenience

Function: Bluetooth audio receiver and transmitter in one

no longer worries about the problem of insufficient power

easy to carry

C7 Transparent Crystal Wireless Speaker style:High match while its whisper-quiet motor ensuresHigh version: Battery capacity: 800mAh Playing time: about 12 hours Bass effect: 6D surround bass Wireless interconnection: TWS series Card playback: TF card playback Lighting effects: colorful rhythm flashing lights Output power: 5W Bluetooth version: BIuetooth5. 0 Transmission distance: about 10m Low version: Battery capacity: 600mAh Playing time: about 12 hours Bass effect: 6D surround bass Wireless interconnection: TWS series Card playback: TF