2. One click alarm for emergency help and Smart Life App compatible for smart phones push notifications by receiving the alarm information from the sensor on smart phones anywhere, anytime needed. 3. Wide applications with its mini design and fits for the elderly and children particularly by pressing it gently to send the emergency help. No complex operations and buttons. 5.100dBm emission frequency and battery powered; carry it anywhere you like with the rope, use with the gateway hub to define the working mode of the scenario anywhere from anytime. Specification: Material: ABS Wireless frequency: 2.4GHz Emission frequency: 10dBm Emission current: peak value 45mA, average12mA Quiescent current: 23uA Emission distance: 100m+(Open space) Battery: CR2032 Working temperature: -20& 8451;-60& 8451; Working humidity: ≤95%RH (non-condensing) Color: White Packaging included: 1 * SOS Emergency Button Sensor 1 * User manual 1 * Needle