беспроводной дверной звонок

1.digital doorbell,wireless doorbell,Do not interfere with each other2.The work voltage of the receiver110V or 220Vrequested by customer's Gird Voltage3.Power2W4.Work Frequency 315MHz or 433.92MHzrequested by customers5.Remote Control/ Incept Distance120m(in open air)6.AC terminalPinsRound Plug flat PlugGerman PlugBritish Plug7.Work Voltage of the Emitter:12V(Battery Model:23A 12V)8.Work Electricity of the Emitter15mA(20 times a day by calculating,a high qualitybattery can use for a year)9.LED Indicatorpress the send button,LED indicator light will flash,Emitter workand the receiver receive the order and then send out the beautiful music reminded youthe VIP visit,the green-ray LED of the receiver will regular flash along with the music.10.Music source38songs supply for choice, Use the External button "up/down"to finish.(the music include AsiaEuropeAmericas famous songs,also has 10 songs of Arab MusicConcert which the Middle East customers' like)11.The function of volume regulatehighmiddlelow three volume can choice,Use theExternal switch(or button)to finish.