Feature: 1. Wireless Transmission: The pager systems is a host that controls 16 sub machines, with wireless transmission, up to 998 sub machines can be connected, which can serve more customers 2. 800m Transmission: The restaurant calling pager system has a transmission distance of 800 meters, with vibration, buzzer, flashing light 3 vibration modes 3. Deep Waterproof Design: The restaurant pager has a safe deep waterproof design, with touch screen keyboard transmitter host, which is waterproof and oil proof 4. 20H Standby: The wireless pager systems has a stable and reliable chip to ensure long standby time of 20 hours, which can avoid frequent charging troubles 5. Scope of Application: The wireless calling system is 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:Wireless Calling System Material: Plastic, Electronics Host: Transmission Frequency: 433MHz Transmit Power: 240mW Number of Game Subs: 998 Number of Charging Handsets: 16 Pager: Receiving Frequency: 433MHz Receive Sensitivity: -114dBm Standby Current: 30mA Standby Time: 20H Transmission Distance: More Than 800meters/874.9yd Prompt Method: Buzzer, Flashing Light Battery Type: Built in 250mah Lithium Battery. Package List: 1 x Wireless Calling System 16 x Restaurant Pager1 x Power1 x User Manual Note: Shipped with Built in Battery