Description :  KERUI F85 Wireless Waiter 5 Keys Calling Call Button with Menu Folder Water Call Order Checkout Cancel 433MHz   Features :  5-Buttons: Order、 Checkout、 Cancel、 Call、 Water Work with our receiver to combined the wireless calling system. Can be installed on each table、 when the customer need help only press the button、 the calling no will be shown on the screen、 so everyone can be easy to know who is calling.  Wireless Distance: 100M in open area Wireless Coding: PT1527、 EV2262 Frequency: 433MHz Size: 14 x 2.5 x 20.5cm   Package includeds :  1 x KERUI F85 Calling Button 3 x AAA Battery   Details pictures :