Features 1、Quick Calling: When there is emergency, just push the call button, and the alert message will immediately send to the receiver. 2、Stable Signal: The working range can get up to 1000 meters in an open area, making sure that you will never loss a call in night. 3、Alerting Mode: Has 3 kinds of alarming modes, flashing and vibration, flashing and buzzer, flashing and vibration and buzzer. 4、Extensive Use: Can be widely applied in home, nursing home, hospital and so on, suits perfectly for the elderly, patient, etc. 5、Easy Carrying: Comes with a light weight and a compact size as well, ideal for both indoor and outdoor, safeguarding the safety. Specification Item Type: Caregiver Pager Watch Receiver Parameter: Operating Frequency 433.92MHz Charging Voltage: DC5V Working Voltage: DC3.7V 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 433.92MHz Material: ABS Battery Type: 1 x 23A12V battery. Battery Capacity: 80mAh, included. Emission Current: 10mA±3mA Standby Current: <1uA Open Distance: Approx. >1000m / 3280.84ft Keystrokes: 1000,000 times Waterproof Grade: IPX4 Working Temperature: -20℃ ~ 55℃ Single Key: Call Package List 1 x Receiver 1 x Button 1 x Charging Cable 1 x User Manual