Feature: 1. PERMANENTLY SAVE CALL RECORDS: Pager system will not lose call records even if the power is off or restored to 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 freely set to adapt to different usage scenarios and improve efficiency. 3. SIMPLE AND EASY TO USE: Wireless caregiver pager watch adopts LCD screen display and humanized menu operation, easy to use and convenient. 4. MULTIPLE PROMPTING METHODS: Wireless watch receiver adopts vibration, ringtone and other prompting methods, reminding timely and effective, and also has a perpetual calendar display function. 5. LONG BATTERY LIFE: Wireless calling system buil in high capacity battery, no need to charge frequently, to ensure long time use. Specification: Item Type: Wireless Calling 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 Parameters. Operating Frequency 433.92mhz Battery: DC12V Battery Type: Alkaline Battery (23A12V Battery) Single Pager Battery Capacity: 60mAh (Included) Transmit Current: 10mA±3mA Standby Current: <1uA Open Distance: >Approx. 200m/656.2ft Keystroke:1,000,000 Times Waterproof Rating: IPX4 Operating Temperature:-20℃~ 55℃ 1 Key: Call. Package List: 1 x Watch Receiver20 x Pager1 x Charger 1 x Charging Cable 1 x Instruction Manual