... speaker Transmit the music by BT to the speaker Line in, apply to PC,mobile phone,mp3.mp3, etc ... out of its two powerful 3-inch drivers, be sure to grace your party with the latest hits and dance ... lithium battery with 3 hours working time*Aluminium housing to be more attractive and fashionable1.Power: 2pcs x 3W ... : 3 hours max9.Last Time: 4hours (via bluetooth to play)10.Driver Unit: 40mm, 4 Ohm ,3W11 ...