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 SystemMaterial: ABSWatch Receiver ParametersNumber of Connected Pagers: 500Alerting Method: Vibration, Beeping, Blinking;Receiving Sensitivity: -110dbmCall Information Storage Capacity: 20 GroupsBattery Type: Lithium BatteryBattery Capacity: 250mah (Included)Standby Time: 7 DaysPush Button Pager Parameters.Operating Frequency 433.92mhzBattery: DC12V Battery Type: Alkaline Battery (23A12V Battery)Single Pager Battery Capacity: 60mAh (Included)Transmit Current: 10mA3mAStandby Current: <1uAOpen Distance: >Approx. 200m/656.2ftKeystroke:1,000,000 TimesWaterproof Rating: IPX4Operating Temperature:-20~ 551 Key: Call.Package List:1 x Watch Receiver20 x Pager1 x Charger 1 x Charging Cable 1 x Instruction Manual