Features: 1. Improve work efficiencyand enhances the restaurant'for image;Minimize crowds in waiting line and Reduce staff chaos ;Notify people faste and Reduce staff chaos & improve ambience. 2.20 channels base and 20 pieces of pagers help avoid the waiting of the client in the long queue to a great extent. 3.1km Long Connection Distance. A built-in antenna enables pager to work normally within 1km from the base 4.3 Indication Modes. Adopting 3 indication modes of vibration, bee cue, and vibration plus bee cue to make it suitable for different situations. 5.Widely used in various commercial situations such as restaurant, cafe, milk tea shop and etc. Specifications: Material: ABS Color: Black Plug Type: AU Plug; EU Plug; UK Plug; US Plug Channel: 20 channels Indication Mode: Vibration, bee cue, vibration plus bee cue Working Voltage: DC5V/5A Working Frequency: 433.92MHz Standby Current: 245mA Transmitting Current: 10030mA Connection Distance: Within 1km Input Voltage: 100-240V Size: Approx. 15x30x3.3cm/5.91x11.81x1.3in Weight: Approx. 1600g Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 Piece 20 Channels Main Engine 20 Pieces Receivers 1 Piece Power Adapter 1 Piece Antenna