Brand CPTCAM Model CP-3003 Quantity 1 Color Red + black Material ABS + Electronic components Features 1.8" display single unit measure distance: 50cm~18m double unit measure distance: 1.2~30m accuracy: +/-0.5% +/-1cm frequency: 40KHz working temperature: 0~50'C. Powered by 1 x 9V 6F22 (not included) Application Perfect tool to quickly know the distance area or volume of a room! It transmits ultrasonic waves to a point you want to measure then it measures the time taken by the waves to reflect so that to calculate and re-transcribes the distance. Packing List 1 x Distance meter 1 x Tool