1. Display size: 104 x 28 x 20 mm. 2. Suitable for 2, 3 & 4 sensors. 3. Sensor type: drilling ( make a hole on car bumper for sensor mounting ). 4. Sensor color: black, white, silver, red, blue, yellow or ordered by customer. 5. Digital display is visible, compatible with indicator light, help driver to know the parking distance. 6. Use Y-2600B controller. 7. Working voltage:?DC12V +/- 2V. 8. Max power:?< 5W. 9. Working temperature: -35 ~ 80oC. 10. Display distance: ?1.8m. 11. Alarming distance: ?1.5m. 12. Alarm voice: 50dB.