Induction Head:
1. Packed three AAA 1.5 V battery, or plug in the power adapter (DC 9 to 15 V/p 250
2. Turning on the power supply, the doorbell can be normal use after 15 seconds buffer
3. Turn the function: "I" file - induction head not pronunciation and receiver pronunciation;
4. When someone is in the range of sensing head (induction distance: 3 to 7 meters, induction Angle for around 120 DHS, 60 DHS), sensing head emit radio signal to the

Receiver: First with 220v socket, and has two blue button on the fromt of receiver:
1. On the left side is the volume button - control the volume, it has 4 file volume is for choose
2. On the right side is for choose the song-16 classic chord melody (light press selects with batteries, or plug in the power adapter (DC 9 to 15v/p 250 ma, need to buy yourself), seconds radio waves, after receiving radio waves, broadcast receiver once the user has

The product of the wireless signal effective distance is 200 meters (empty distance).