Bluetooth specification: CSR V4.0

Bluetooth profiles: HSP, HFP, A2DP and AVRCP

Operating distance: 10 meters Class II

Mobile power supply: IN-5.0V 1.0A ; OUT-5.0V 1.0A

Battery:4400mAh 3.7v  lithium battery

Music playing time: About 18-25 hours

Standby time: About 200 hours

Charging time: About 4-5 hours

Output power:20W + 20W

Frequency Response: 60-20khz

SNR:›80dB

Power Supply: DC 24V 2.5A

Distortion rate: < 10%