Feature 1Efficient: Improve efficiency and customer satisfaction with this sleek and reliable wireless call system. Supports up to 400 callers and features a stylish and durable design. 2Long Range Capability: With a transmission distance of over 200m, this wireless call system is perfect for larger establishments. Ensure your staff can be reached easily and quickly. 3Time Display Function: The receiver of this wireless call system features a built in clock, allowing your staff to keep track of time while attending to customers. Stay organized and efficient. 4Easy Installation: Simply plug in the receiver and pair the buttons for a hassle free setup. No complicated wiring or programming required. Get your call system up and running in no time. 5Versatile Usage: Ideal for restaurants, hotels, hospitals, offices, bars, clubs, and casinos, this wireless call system offers a convenient solution for improving communication and customer service.Item Type:WirelessCallingSystemSU-620 Display Receiver Parameter Description:Working Frequency: 433.92MHz Size: Approx. 210 x 140 x 30mm / 8.3 x 5.5 x 1.2in Material: ABS Receiver Sensitivity: -105dB Decoding: Learning Code Waterproof Rating: IPX4 Operating Temperature: -20~ 60 Voltage: 100-240VSU-1K Button Transmitter Parameter Description: Working Frequency: 433.92MHz Material: ABS Battery Type: Alkaline Battery Battery Model: 12V23A Battery Capacity: 60mAh (included) Transmission Current: 10mA3mA Standby Current: <1uA Open Distance: >200m / 656.2ft Button Lifespan: 1 million clicks Waterproof Rating: IPX4Operating Temperature: -20~ 60 Single Key: CALL .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List 20 x Desk Bells 20 x Adhesive Stickers 1 x Power Adapter 1 x Receiver 1 x User Manual