NOTE :Only 220V voltage Countries can use it, other voltages countries please do not place order. Function: * 20 channels-the basis of 20 channels and 20 pagers helps to avoid long queues for customers to a large extent. * 20 loading page slots can be placed on the base, which can be loaded when idle. * 1km connection distance-the built-in antenna enables the pager to work normally within 1km from the base. * A variety of prompt methods, sensitive response. * Multiple guests can be called at the same time. * Wide compatibility, suitable for places with many customers waiting for service. Specifications: Name: wireless meal taker set fuction : Vibrate+Ring+Flash Material: ABS Voltage: 220V Frequency: 50Hz Menu size: 9.2 * 4.5 * 1cm Base height: 3.5cm Overall size: 22 * 14.5 * 10.5cm Packaging includes: 1 * wireless meal taker 16/20* Receiver Attention: 1. Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting. 2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.