door bell

Detailed Product Description

7.Work Electricity of the Emitter≦15mA(20 times a day by calculating,a high quality
battery can use for a year)
8.LED Indicator：press the send button，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 shine along with the music.
9.Music source：38songs supply for choice, Use the External button "up/down"to finfish.
(the music include Asia、Europe、Americas famous songs,also has 10 songs of Arab Music
Concert which the Middle East customers' like)
10.The function of volume regulate：high、middle、low three volume can choice，Use the
External switch(or button)to finish.