Description :  KERUI C2999 Digital Diaplay Wireless 4 Types Human Voice Prompt Alarm Calling System for Restaurant Waiter Pager   Features :  Human voice prompt、 easy to use. Brightly and widen digital diaplay and more striking. 4 types voice model and voice volume can adjust. Support 999 transmitters、 20 remote controllers. Can Store 60 calls and track the calls up and down. 8 types of model optional suit for various occasions. Can connect with external siren. Compatible with other brand transmitter. Working together with a Signal Transmitter or Remote Control、 or Panic Button.  Specification :   Compatible Coding: PT1527、 EV2262 Working temperature: -10\u2103 to 50\u2103 Adapter DC: 110V~220V to 9-12V Wireless Receive Distance: 150m Open Area Wireless Frequency: 433MHz Dimension: 400 x 155 x 38mm   Package includeds :  1 x KERUI C2999 Wireless Call System   Details pictures :