Specifications:
 Bluetooth Version : V5.0
 Transmission distance : 10 meters
 Frequency Response : 20Hz-20KHz
 Rated Power : 9mW
 Charging Box Battery Capacity : 200mAh
 Earbud Battery Capacity : 28mAh
 Charging Time of Charing Case : 3 times
 Input : DC5V=450mA
 Play Time : about 7H
 Standby Time : about 500H
 Charging Time : about 1H
 Net Weight : 30g