STR International STR RADIY-DM The STRADIY-DM is a microwave radar-sensor with a range of 16 to 160 feet with a 16 foot wide beam. This detector is designed to monitor it's protected zone for movement and continuously “learn” and adjust to changing weather and terrain conditions including 1 foot tall grass and snow up to 1 1/2 feet without adjusting the unit! Radiy series detectors use the Doppler effect and digital analysis of the Doppler waves to detect intruders. It's ability to work in extreme temperatures (-58 to 149 F) and it's economical power consumption (0.7w) make this unit stand out in the field! The alarm sounds if person moves within the protected zone, the unit's case is opened or powered off, and if power reduces under 10.2 volts DC Extreme temperature range, IP55 protective casing. Includes one Transceiver and mounting hardware. Easy to deploy. Kits come complete with transmitter, receiver, and mounting hardware!