1 Light ,portable 2 TF card and FM radio 3 Smart and fashion design 4. Aluminium alloy shell for better sound quality wireless ... ,having overcurrent, overvoltage,high temperature,short-circuit protection.40W,available light current power. About the Emitter: 1.Firstly Open the Frame ... open the emitter at the left side,there is blue light of the emitter device. 2.Source from the computer,please ...