Main functions: Distance is indicated on LCD with digital Multi-leveled simulating strips indicate the distance from obstacle Direction identification of obstacles at left, middle and right 3 levels of beep alarm/english voice distance indicating 2, 3, 4, 6 or 8 detectors and multi-colored outer/inner detectors are selectable TECHNICAL SPECIFICATIONS： Rated Voltage: 12V DC ( 24V available) Operating Range: 10.5V～16V DC（15～27V） Rated Current: 20mA～200mA Detecting Distance: 0.2～ 1.5m Ultrasonic Frequency: 40KHz Control Working Temperature：-30～+80°C Display Working Temperature：-30～+70°C