【WIDE OPERATING RANGE】A security alarm system is an essential piece of equipment in a home security system. It detects movement in surrounding areas such as driveways, front porches, gates, homes, sheds, offices, sidewalks, swimming pools, etc..【IR SENSOR】The IR sensor detects movement and sends a signal to the receiver. Simply place the sensor at the entrance to your driveway and the receiver will be at home. The motion detector then provides extra security for your property and loved ones..【LONG RANGE WIRELESS】Communication distance from each sensor to the receiver can be up to approximately 100m/109.36yd (in an open, unobstructed, interference-free environment). Simple to operate and follow your heart, keep a good distance from the receiver to alert your family's arrival and departure..【EASY TO INSTALL】The motion detector alarm installs wirelessly, so all you have to do is place the sensor at the entrance and the motion sensor will ring to alert you when someone is approaching. It is also perfect for business owners to alert unseen customers to enter the store..【SATISFACTION GUARANTEE】If you have any comments about our products, please feel free to contact us, we will reply this email within 24 hours and solve your problem as soon as possible. Please add it to your cart now!