1. Quick Calling: When there's emergency, just push the call button, and the alert message will immediately ship to the receiver. 2. Stable Signal: The operating fluctuate can arise to a thousand meters in an open area, ensuring that you're going to never loss a choice in night. 3. Alerting Mode: Has three forms of alarming modes, flashing and vibration, flashing and buzzer, flashing and vibration and buzzer. 4. Extensive Use: Can be broadly utilized in home, nursing home, health center and so on, fits completely for the elderly, patient, etc. 5. Easy Carrying: Comes with a light weight and a compact size as well, superb for both indoor and outdoor, safeguarding the safety. Item Type: Caregiver Pager Watch Receiver Parameter: Operating Frequency 433 Charging Voltage: DC5V Working Voltage: DC3 Lithium Battery Model: 602030 Battery Capacity: 300mAh, included. Working Current: 100±20mA in vibration and buzzer mode, 75±10mA in vibration mode. Standby Current: 10±5mA Receive Sensitivity: -107±2dBm Decoding: Learning Coding Waterproof Grade: IPX7 Working Temperature: -20℃~ 60℃ Button Launcher Parameter: Operating Frequency 433 Battery Type: 1 x 23A12V battery. Battery Capacity: 80mAh, included. Emission Current: 10mA±3mA Standby Current: Less than 1uA Open Distance: Approx. Greater than 1000m / 3280 Keystrokes: 1000,000 occasions Waterproof Grade: IPX4 Working Temperature: -20℃ ~ 55℃ Single Key: Call Note: Due to diverse production batches, there may perhaps even be slight versions in products. Colour:Black Material:ABS Package Contents: 1 x Receiver 1 x Button 1 x Charging Cable Only the above equipment content, other merchandise usually are not included. Note: Light mirrored image and various reveals could cause the colour of the article within the photo slightly diversified from the genuine thing. The size allowed error is +/- 1-3cm.