Feature: 1. RF Wireless Technology: Wireless caregiver watch features a dot LCD display with RF wireless technology and a stylish watch design 2. Time Display: Wireless smart caregiver pager supports 500 channels with accurate time display for peace of mind 3. Low Power Consumption: Wireless smart caregiver watch supports vibration and buzzer alerts, single or list display modes and low power consumption display 4. Removable Rechargeable Battery: The Wireless calling system uses a removable rechargeable battery for long standby times, with rechargeable circuit protection 5. Scope of Application: Calling caregiver watch can be used at home, hotels, bars, restaurants, factories, clubs, hospitals and offices Specification: Item Type: Wireless Caregiver Watch Material: ABS, PVC Operating Frequency 433.92MHz Size Specification: Approx. 46 x 48 x 15mm / 1.8 x 1.9 x 0.6in (without strap) Battery Model: 502535 Battery Type: Lithium Battery Battery Capacity: 400mah(included) Working Voltage:DC3.7V Operating Current:57mA±10mA(buzzer mode),95mA±10mA(vibration mode) Standby Current:<8mA Power Failure Current:180±5uA Receiving Sensitivity:-108dBm Decoding:Learning Coding Waterproof Rating:IPX4 Operating Temperature:-20℃ to 55℃ Button Transmitter: Material: ABS, PVC Operating Frequency 433.92MHz Colour: Black Battery: DC12V Battery Type: 12V 23A Battery Type: Alkaline Battery Capacity: 45mAh(included) Emission Current: 10mA±3mA Standby Current: <1uA Clearance Distance: 100 to 200meters/109 to 218yd Push Button:1 Million Times Waterproof Rating:IPX7 Operating Temperature:-20℃ to 60℃ Single Key:CALL. Package List: 1 x Wireless Caregiver Watch Receiver1 x Wireless Caregiver Watch Button1 x Power Cable1 x User Manual Note: Shipped with Built in Battery