Feature:1. Time Display: The receiver of the restaurant call button system features a time display, allowing your staff know time while attending to customers. Stay organized and efficient.2. Efficient Use: The wireless calling system supports up to 400 callers and features a stylish and durable design, can effectively improve the working efficiency.3. Long Transmission Distance: The restaurant pager system features 200m transmission distance, perfect for larger establishments, ensuring that your staff can be reached easily and quickly.4. Versatile Application: The wireless caregiver call system is suitable for restaurants, hotels, hospitals, offices, bars, and casinos, providing a convenient solution to improve communication and customer service.5. Easy Installation: Simply plug in the receiver and pair the buttons for a hassle free installation. No complicated wiring or programming required, time and effort saving.Specification:Item Type: Wireless Calling SystemReceiver:Working Frequency: 433.92MHzSize: Approx. 210 x 140 x 30mm / 8.3 x 5.5 x 1.2in Material: ABSReceiver Sensitivity: -105dBDecoding: Learning CodeWaterproof Rating: IPX4Operating Temperature: -20~ 60Transmitter:Working Frequency: 433.92MHzMaterial: ABSBattery Type: Alkaline BatteryBattery Model: 12V23ABattery Capacity: 60mAh (included)Transmission Current: 10mA3mAStandby Current: <1uAOpen Distance: >200m / 656.2ftButton Lifespan: 1 million clicksWaterproof Rating: IPX4Operating Temperature: -20~ 60Single Key: CALL.Package List:10 x Desk Bells10 x Adhesive Stickers1 x Power Adapter1 x Receiver1 x User Manual