When the body is near, it will automatically activate the alarm with high sensitivity within a range of 4-5 meters. Place or mount the alarm at a suitable height. Within a 5-meter range and a 120-degree horizontal angle, the device will detect motion from people or animals moving within a short time and trigger the alarm. Monitoring and detection function: After activation, it can be used with compatible communication tools. Wait a few seconds after connection to clearly monitor the surroundings within a 15-meter area. Operation frequency: 850MHz, 900MHz, 1800MHz, 1900MHz Working current: below 10mA Idle current: below 0.05mA Voltage: AC100-240V Plug Type: US Plug, compatible with Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines, and others. / EU Plug, compatible with Indonesia, Germany, France, Spain, Italy, and others. Color: Black Material: Plastic Package Contents: 1 x Mini GSM Motion Sensor Only the above items are included; other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3 cm.