1、PERMANENT CALL RECORDS: Call records will not be lost even after power failure/restoration of the factory, which is convenient for tracking and management. 2、MULTIPLE CALL COMMANDS: Wireless calling system has 33 built in call commands, which can be set freely to adapt to different usage scenarios and improve efficiency. 3、LCD SCREEN DISPLAY: Wireless caregiver watch pager system with LCD screen display and humanized menu operation, easy to use. 4、MULTIPLE PROMPTING METHODS: Vibration, ringtone and other prompting methods are integrated, reminding timely and effective, both with perpetual calendar display function. 5、LONG BATTERY LIFE: Waiter call button system has a built in high capacity battery, no need to recharge frequently, to ensure long time use. Item Type: Wireless Call Button Watch System Material: ABS Watch Receiver Parameters: Number of Connected Pagers: 500 Alerting Method: Vibration, Beeping, Blinking Receiving Sensitivity: -110dBm Call Information Storage Capacity: 20 Groups Battery Type: Lithium Battery Battery Capacity: 250mAh (Included) Standby Time: 7 Days Push Button Pager Parameter Description: Operating Frequency 433.92MHz Battery Type: Lithium Manganese Battery CR2032 Single Pager Battery Capacity: 240mAh (Included) Transmit Current: 10mA±3mA Standby Current: <1uA Open Distance: >Approx. 200meters / 656ft Keystroke: 1000000 Times Waterproof Rating: IPX4 Operating Temperature:-20℃ to 55℃ One Key: Call 1 x Watch Receiver 20 x Pagers 1 x Charger 1 x Charging Cable 1 x User Manual