Vevor Restaurant Wireless Guest Paging System 16 Beepers Queuing Calling Pagers Waterproof Touch Screen Keyboard 300-500m Wireless Remote Control Multiple Prompt Modes Long Standby Battery 98 Channels & 16 Pagers Wide Application Host Machine: Host Power: 100 mW 315 MHz The Maximum Number of Channels: 98 Receiver: Material: ABS plastic Sub-machine Size: 10.3 x 4.9 x 1 cm/4.06 x 1.92 x 0.39 inch Host Launch Distance: 300-500 meters Standby State: 10 mA Working (Vibration) State: 75 mA Standby Time: 20 hours Reminder Method: Vibration Flash Buzzer Host Size: 23.5 x 15.8 x 3.6 cm/9.25 x 6.22 x 1.42 inch Battery: 3.7V/200 mha Model: F101 Standby Power Consumption: 25 mW Host Power Supply: DC/9V1A