Specifications:

Wireless Version: V5.0

Transmission Distance: 10m

Frequency Response: 20HZ-20KHZ

Output Sensitivity: 100 +- 3db

MIC Sensitivity: -42db+- 3db

Battery Capacity: 300mAh

Resistance: 32ohms

Rated Power: 19mW

Driver Unit: 40mm

Play Time: 8hrs (at 70% volume)

Standby Time: 200hrs

Charging time: 2.5hrs

Charging Voltage DC 5V= 500mA