Parameters Power 3V DC, Button Cells. RF Code PT2242 RF Frequency 433.92MHz Oscillation Resistance 3.3Mohm Transmission Distance 30~80meters indoor Static Current8uA - 9uA Peak Current7.2mA-8.5mA(sending signal) Battery Life time One and a half years IP Grade IP66 Dimensions 5.352cm Weight 30g Works with King Pigeon A10A11A20 GSM Elderly Guarder Alarm panel. King Pigeon S100S110S120S160 GSM wireless alarm panel. Other universal wireless alarm systems. How it works 1. Fall down incident alarm When the fall down has been detectedl,at the 6th second,indicator will flashing quickly and send wireless alert signal to alarm panel on the 15th second.Alarm panel send SMS or call to Central Monitroing System or related persons for alarming or communication. 2. SOS alarm Press the SOS button for more than 3 seconds, SOS indicator flashing quickly and the emergency alert signal will send to alarm panel. In case of False Alarm Due to the daily life activities(like some sports,sit back on a coach,etc.),sometimes the fall down button may detect a fall incorrectly, this situations may caused false alarm. However, users can manually cancel the alert signal by pressing the emergency button or make it on normal stand up position while the red indicator is flashing quickly. Users will know that the fall down alarm has been canceled successfully when the indicator flashing slowly twice. Users can also cancel a false alarm by pressing the stop button on A10A11 alarm panel or Cancel button on other alrm panels to cancelstop the alarming. If the alarm is not canceled within the allotted time, alarm panel will send SMS or call CMS or related persons,users could talk with them for clarify the situation.If the CMS or related person can’t communicate with users,emergency help service should be dispatched asap. Typical Solution EM-90 button + A10 GSM elderly alarm + KingCenter CMS-01