FunctionCall, Cancel, Pay, Order Function Key Very 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 Design: Small 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 code. Compared with fixed code type, the signal interference can be well controlled with better signal stability. Built-in CR2016 Button Battery: The pager contains two CR2016 button batteries. Double Sided Tape Design: With double sided tape, the pager can be attached to 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: Black 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 to be a little different from the real thing. The measurement allowed error is +/- 1-3cm.