When the body is near,it will automatically start the alarm,The highest sensitivity in the range of 4-5 metersPut or paste the alarm in a certain height, within 5 meters within the angular range 120 degrees left and right, as long as people or animals, swaying back and forth in a very short time, induction starts.Monitoring and Interception - After turning on, it can be connected by communication tools. And waiting for a few seconds after through, you can hear clearly the situation 15 meters area around.Operation frequency:850MHZ,900MHZ,1800MHZ,1900MHZWorking current:below 10mAIdle current:below 0.05mAVoltage:AC100-240VPlug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on.Colour:BlackMaterial:plasticPackage Contents:1 * Mini GSM Motion SensorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +- 1-3cm.