CP3007 Handheld 1.9" LCD Ultrasonic Electronic Rangefinder - Black + Yellow (1 x 9V)
Error: 0.5%; Maximum distance measurement: 18m; Maximum distance sum: 180.00 m; Maximum calculate area: 18 x 18 square meter; Maximum calculate volume: 1800 cubic meter; Transmission frequency: 40kHz; Accuracy: +/-0.5%; Resolution: 0.01m; Working temperature: 0'C~50'C