This is 500 meters transmitter. It works with 99 channel receivers, which have learning code and fixed code two different models. This kind of transmitter can be put on the table or stick on the wall. When the customers need service, he/she just press the button, the receiver will receive a RF signal and know which table or room needs service.

Wireless Calling System is a kind of electronic product providing calling service. It uses latest RF technology which includes software and hardware. 

Please allow us 2-4 business days to prepare your order and shipping after the payment is cleared. The package usually arrives to your door in about 7-10 days after shipping by Standard Flat Rate Shipping Service. However, sometimes it takes more days due to holidays, customs clearance or other reasons. DHL, EMS, FEDEX,UPS  door to door service are optinal for you.