The range of distance: 10 meters
Rated power: 40 mw
Cable length: 1.5 m
Receiver unit: 4.5 mm X 2 mm - 58 db/db
Plug type: 3.5 mm stereo
Rechargeable lithium battery: 250 mah
Charging time: not more than three hours
Normal volume playing time: 4 hours
Standby time: 72 hours