・【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 Package included: ・1 x Receiver ・2 x Transmitter ・1 x English Instruction Manual ・1 x Installation Pack