Restaurant Pager System 1 Host 15 Pagers Stackable Charging 300m Coaster Paging System with 3 Vibration Modes 100240V Feature: 1. 300 Meters Transmission Distance: 300 meters transmission distance, 3 vibration modes (vibration, buzzer and flashing light), 433.92MHZ transmission frequency. 2. Waterproof: Safe and deep waterproof design, no longer have to worry about overturning the soup, touch screen keyboard to transmit the host, waterproof and oilproof, stylish and beautiful. 3. Touch Keyboard: Touch keyboard integrated keyboard base, intelligent charging system prolongs service life, stacking charging saves space, and standby time is about 20 hours. 4. UHF Technology: UHF ultra high frequency technology, unique system ID, eliminating interference, multiple systems can work in the same environment. 5. Wireless Transmission: One host controls 15 sub machines, wireless transmission, can connect up to 998 sub machines, widely used in fast food restaurants, food courts, pizzerias, churches and auto shops or other places where there are many customers waiting to be served. Specification: Item Type: Restaurant Pager System 15 Material: Plastic, Electronics Model: 9303 Input Power: DC12V/2A Transmission Frequency: 433.92MHZ Transmit Power: 240mW Transmission Distance: Approx. 300meter / 9.8ft Number of Game Subs: 998 Number of Charging Handsets: 15 Standby Time: More Than 20 Hours Tips: Vibration, Buzzer, Flashing Light Modulation Method: AM OOK Keys: (Touch) Number Keys, Call Key, Delete Key Battery Type: Built in 200mAh Lithium Battery Applicable Voltage: 100-240V Package List: 1 x Main Unit 15 x Sub Machine 1 x Power 1 x User Manual How to use:plug and play