Features：
1. LCD display
2. Three background alarm colors
3. Direction indicator
4. Voice indicator
5. Insert-in sensors optional
6. "DangDang" alarm sound
Technical Data:
1. Rated Voltage: 12V
2. Operating Range: 9~16V
3. Rated Current: 20~200mA
4. Detection distance: 0.3~2.5m
5. Ultrasonic Frequency: 40KHz
6. Working Temperature: -30~+70C