describe When the human body approaches, the alarm will automatically start, with the highest sensitivity range of 4-5 meters. Place or stick the alarm within 5 meters at a certain height and within an angle of 120 degrees left and right. As long as a person or animal rocks back and forth in a short period of time, the sensing will start. Monitoring and interception - after turning it on, you can connect through communication tools. And within a few seconds after passing through, you can clearly hear the situation in the surrounding 15-meter area. Working frequency: 850MHZ, 900MHZ, 1800MHZ, 1900MHZ Working current: 10mA Idle current: 0.05mA Voltage: AC100-240V Plug type: EU plug, suitable for Indonesia, Germany, France, Italy, etc. Colour: Black material: plastic Package Contents: 1*Mini GSM motion sensor Contains only the above package contents and does not include other products. NOTE: Light reflections and different monitors may cause the color of the item in the picture to differ slightly from the actual item. The measurement allowance is +/-1-3cm.