1 Light ,portable 2 TF card and FM radio 3 ... controller to the background music systems in any time of the day powered on/off. Time Switches and arbitrary ... overcurrent, overvoltage,high temperature,short-circuit protection.40W,available light current power. About the Emitter: 1.Firstly Open the ... the emitter at the left side,there is blue light of the emitter device. 2.Source from the computer,please ...