A10 Digital Display Wireless Calling System 60 Melodies Restaurant Pager Long Range Service Bell 2 Transmitters + 1 Receiver 【Long-Range Wireless Calling】Experience uninterrupted service with a impressive 300-meter transmission range, ideal for large restaurants, tea houses, and gaming rooms. 【Versatile Sound Options】Choose from 60 different melodies and 5 adjustable volume levels, including a silent mode with flashing lights for quiet environments. 【Easy Installation】Enjoy plug-and-play convenience with no wiring required, making setup quick and effortless in any location. 【Digital Display】The receiver features a digital display to easily identify different call buttons, enhancing efficiency in busy environments. 【Multi-Purpose Use】Suitable for various settings including home staircases, rooms, bathrooms, as well as commercial spaces like card rooms, internet cafes, and tea houses. Specifications: Material: ABS Transmitter Power: One 12V 23A battery Receiver Power: AC 100-240V Transmitter Dimensions: 75mm x 51mm x 20mm Receiver Dimensions: 95mm x 65mm x 24mm Transmission Range: Up to 300 meters in open space Number of Melodies: 60 Volume Levels: 5 adjustable levels (including silent mode with light only) Display: Digital number display on receiver Installation: Wireless, plug-and-play