buzzer parking sensor, cheap, full function Function1. BiBi alarm2. 4 sensors (2 to 8 sensors are optional)3. alarm voice is adjustive4. the color of the sensor are optionalTechnical Parameters1. rated voltage, 12V DC2. working voltage Range, 10.5V~16V DC3. rated current, 20mA~200mA4. detecting distance, 0.2~1.5m 5. working temperature, -30~+70°C Buzzer Parking Sensor ^0^ accept paypal