Efficient Wireless Calling System Boost efficiency and customer satisfaction with this sleek and reliable wireless calling system. Supports up to 400 pagers with a durable design. Long Range: Boasting a transmission distance of over 200m, perfect for large facilities. Ensure your staff can be reached quickly and easily. Time Display Function: The receiver features a built-in clock to help staff stay organized. Easy Installation: Simply plug in the receiver and pair the buttons for a hassle-free setup. No complicated wiring or programming needed. Versatile Use: Ideal for restaurants, hotels, hospitals, offices, bars, clubs, and casinos. Provides a convenient solution for improved communication and customer service. Receiver Working Frequency: 433.92MHz Receiver Size: Approx. 210 x 140 x 30mm / 8.3 x 5.5 x 1.2in Receiver Material: ABS Receiver Sensitivity: -105dB Receiver Decoding: Learning Code Receiver Waterproof Rating: IPX4 Receiver Operating Temperature: -20~ 60 Receiver Voltage: 100-240V Button Transmitter Working Frequency: 433.92MHz Button Transmitter Material: ABS Button Transmitter Battery Type: Alkaline battery Button Transmitter Battery Model: 12V23A Button Transmitter Battery Capacity: 60mAh (included) Button Transmitter Transmission Current: 10mA3mA Button Transmitter Standby Current: <1uA Button Transmitter Open Distance: >200m / 656.2ft Button Transmitter Button Lifespan: 1 million clicks Button Transmitter Waterproof Rating: IPX4 Button Transmitter Operating Temperature: -20~ 60 Single Button: CALL Package Includes: 20 x Table Bells, 20 x Adhesive Stickers, 1 x Power Adapter, 1 x Receiver, 1 x User Manual