Feature: 1. Wide Application: Watch pager system is widely used in homes, hotels, bars, restaurants, factories, workshops, teahouses, bowling alleys, hospitals, health clubs, and offices. 2. Support 500 Channels: Wireless caregiver pager supports 500 channels to meet your various needs. 3. LCD Screen: Wireless calling system adopts dot matrix LCD screen, with clear display and convenient observation. 4. Multi Function Display: Nurse alert system can accurately display the time, and has low power consumption display. 5. Prompt Mode: Wireless watch pager supports vibration, buzzer prompts, and adopts detachable rechargeable battery, which has a long standby time. Specification: Item Type: Watch Pager System Material: ABS,PVC Watch Receiver Parameters: Operating Frequency is 433.92mhz Size:Approx. 46 x 48 x 15mm / 1.8 x 1.9 x 0.6in(Strap Not Included) Battery Model: 502535 Type of Battery: Lithium Battery Battery Capacity: 400mah (included) Operating Voltage: DC3.7V Operating Current: 57ma±10ma (Buzzer Mode) 95ma±10ma (Vibration Mode) Standby Current: < 8mA Power-off Current: 180±5uA Receiving Sensitivity: -108dbm Decoding: Learning Code Waterproof Grade: IPX4 Operating Temperature: -20℃-55℃ Button Transmitter Parameters: Operating Frequency is 433.92mhz Color: Black Battery: DC12V Battery Model: 12V23A Type of Battery: Alkaline Battery Battery Capacity: 45mah (included) Emission Current: 10ma±3ma Standby Current: < 1uA Open Distance: 100-200m Press Key: 1 Million Times Waterproof Grade: IPX7 Working Temperature: -20℃-60℃ Single Key: CALL. Package List: 1 x Watch Receiver1 x Call Buttons1 x Power Cord1 x User Manual Note: Shipment with built in battery.