Describe: Brand new and high quality Made of high quality material, and practical Using the principle of infrared rays, an alarm will sound when people and animals pass through the sensing area When using, open the foot, clamp it on the tent pole or branch, turn the nut to tighten Applicable to: fishing/camping/outdoor activities, burglar alarm, beast protection Note: The alarm starts working half a minute after the switch is turned on, in order to give the installer time to evacuate. Specification: Dimensions: .12x5x3.5cm Sensing range: 5 meters Sensing angle: 100 degrees Battery: 3 x AAA Battery(not included) Weight: about 30g Material: plastic colour: black Package Contents: 1 x Fishing Infrared Sensor Only 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.