• Bluetooth ：V5.3
• Support Bluetooth protocol ：A2DP/AVRCP/HSP/HFP
• Bluetooth operating frequency ：2.402GHz-2.480GHz
• Receiving sensitivity （TYP）：-42d±3dB
• Bluetooth effective distance ：≤10 meters
• Horn power ：Rating 5mW
• Channel system ：Stereo sound
• Frequency response ：20Hz ~20KHzA
• Built in battery：280mAh
• Charging input standard ：DC5V/1A
• Charging time ：about 1.5 hours
• Bluetooth V5.3/20 hours music