Bluetooth SD card playback USB playback Clock Alarm Stereo Loudspeakers: Speaker power: 2x 5W Stereo Connectivity: Bluetooth Inputs/Outputs: ; USB Features: Bluetooth v 5.0 AUX input SD card playback: Mp3, Wav USB playback: Mp3, Wav Playback time up to 15 hours (33% maximum volume) Standby time up to 30 days. Power source: Battery: 1200 mAh Charging time up to 3 hours USB charging physical parameters: Product dimensions: 36×7.5×7.0 cm Case Color: Black Case material: PC material Cable Color: Black Included: USB charging cable USB to AUX cable