FunctionCall, Cancel, Pay, Order Function KeyVery easy for guest use, especially for restaurant use you can get to know your customer detailed wants watch pager can improve the working efficiency effectively Easy to Use: The call button is designed to be user-friendly, making it easy for anyone to use.Compact DesignSmall dimension, light weight and round type make the pagers come with comfortable grip feeling and easy to carry anywhere. Stable Signal:Calling pagers use higher working frequency with learning codeCompared with fixed code type, the signal interference can be well controlled with better signal stability.Built-in CR2016 Button BatteryThe pager posses two pcs CR2016 button batte Double Sided Tape Design:With a double sided tape, the pager can be paste on the table or wall. No need to worry about the loss of pagers. ABS Material:Watch pager adopts quality ABS material more sturdy it has better anti oil ability in restaurant or food truck use. Specifications: A: 4 keys Colour:Red Material:ABS Package Contents: 5 x Wireless Pager Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.