1、Long Wireless Distance: Restaurant pager system adopted high performance wireless technology for long distance, stable and reliable, suitable for a variety of places. 2、Package Included: Restaurant waiting buzzer system supports 400 callers for large scale use, with 30pcs table bell buttons and 1 eeceiver, which can be used for large area. 3、Multifunctional Display: Wireless customer service calling system shows time, and date, which is accurate and easy to remember and use. 4、Wide Application: Restaurant pager system adopted advanced microprocessing chips are widely used in restaurants, hotels, offices and other places. 5、Receiver Specifications: Wireless calling system provides 433.92MHz frequency, and ‑105dB sensitivity, which is small in size for easy to carry and use. Item Type: Wireless Customer Service Calling System Material: ABS Model SU 620 Display Receiver Description: Working Frequency: 433.92MHz Size: Approx. 210 x 140 x 30mm / 8.27 x 5.51 x 1.18in Reception Sensitivity: -105dB Decoding: Learning Code Waterproof Level: IPX4 Operating Temperature: -20°C to 60°C Model SU 1K Button Transmitter Description: Operating frequency 433.92MHz Material: ABS Battery Type: 12V23A Alkaline battery Battery capacity: 60mAh (Include) Transmitting Current: 10mA±3mA Standby Current: < 1uA Open distance: > 200 meters Keystrokes: 1 million times Waterproof Rating: IPX4 Operating Temperature: -20℃ to 60℃ Single Key: CALL 30 x Table Bells 30 x Stickers 1 x Power Adapter 1 x Receiver 1 x User Manual