ly-858-4 features: 1. recessed sensors with lcd display enable your parking easier and safer 2. 3-stage beeping mode indicating different distance 3. car-shaped icon on the lcd indicating precise state of your parking process 4. english on the blue background lcd screen indicating how far you are away from obstacles 5. voice reminder(optional) technical data: voltage: 12v working voltage range: 10.5v ~ 16v dc current; 50ma ~ 180 ma range of detection: 0.2 ~ 1.5 m temperature for cpc: -40 ~ +80oc temperature for display: -30 ~ +70oc