1.The work voltage of the receiver:DC3V ,Batteries Model:AA R6P×2  2.Static electricity of the receiver≦0.*5mA(Ultra-low power ,can extend battery  life)  3.Work Frequency ：**5MHz  4.Remote Control /Incept Distance≧*0m(in open air)  5.Work Voltage of the Emitter：*2V(Battery Model：*3A*2V)  6.Work Electricity of the Emitter≦*5mA(*0 times a day by calculating,a high quality    battery can use for a year)  7.LED Indicator：press the send ，LED indicator light will flash,Emitter work  and the receiver receive the order and then send out the beautiful music reminded   you the VIP visit, the blue-ray LED of the receiver will regular flash along with the   music.  8.Music source：*8songs supply for choice, Use the External "up/down"to   finish.(the music include Asia、Europe、Americas famous songs,also has *0 songs   of Arab Music, Concert which the Middle East customers' like).  9.The function of volume regulate：high、middle、low three volume can choice，  Use the  External switch(or )to finish.