Multifunctional Wireless Doorbell For House Maid Or Office Boy Calling From Touch Panel  This wireless doorbell is compatible with all Touch Panel items in our store Product Introduction: The wireless doorbell adopt advance wireless receiving and dispatching technology, powerful microcomputer control system, high capacity and superior sound processing technology, up to 32 songs with reliable and stable performance.   Doorbell and transmitter connect via wireless learning code, with the function of doorbell, burglar alarm and welcome alarm which suitable for various occasions: like villa, club, leisure center, store, hotel, home, office and meeting room etc. Product Feature: 1) Support multiple doorbell transmitter, suitable for large villa 2) 32 songs optional 3) Doorbell, alarm, welcome alarm all in one 4) Learn 30 accessories (Doorbell transmitter, detector, remote control), without losing number upon power failure 5) Support accessories of 1527/2262 encoding  6) 4 levels adjustable volume  Technical Parameter: 1. Working Voltage: AC 100-240V  2. Working Current: < 100 mA  3. Wireless Frequency: 433 MHz 4. Working Temperature: -10-50 degree centigrade 5. Wireless Distance: 10 up 80 meters (Open area) distance depend on walls and partitions we can not grantee distance   Packing List:1. Doorbell Receiver    1 set2. Doorbell Transmitter  1 set3. User Manual         1 piece