The Tek4 Motion Sensing Alarm is an easy-to-use sensor that delivers both chime and full-out alarm modes. It’s 110 degrees of sensing provide a wide range of coverage that can encompass a nice 800 sq. ft. area. We found it to be exceptional sensitive for larger moving objects and the 68 degree vertical range means that it works well when wall-mounted. The included remote means that, while you can program the device with a code (up to 10 digits), it’s not necessary to access the device to turn it on and off â€“ should you decide to mount it out of the way. The remote can be attached to a keychain or clipped to a belt as desired.