Key Specifications/Special Features: • Sensor with self-test function • Newly design parking sensor with color LED digital display • BiBi alarm sound or voice indicator • Insert-in and stick-on sensors for option • Direction indicator of left and right • 2/4 sensor (optional) Technical Data: • Rated voltage:12V • Operating range:10.5~16V • Rated current:20mA~200mA • Detection distance:0.3~2.5m • Ultrasonic frequency:40KHz • Working temperature:-30~+70??/p>