WIRELESS PARKING SENSOR - The TYPE S Solar Powered Backup Sensor is a proximity parking sensor that detects objects in front of / behind your vehicle and sends hands-free audio visual and vibration alerts to your smartphone via Bluetooth, works for iOS and Android. | REVERSE WARNING BACK-UP PROTECTION: The sensors alert you when obstacles enter your car or truck's path, giving you the help you need to back up with confidence. Advanced chip set for precise detection and coverage. The parking sensor sensing distance ranged from 3. 9ft to 0. 1ft*. | SOLAR POWERED - Effortlessly recharge the censor via natural daylight. Provide reliable & 100% self-sustained power by solar light panel, no replacing battery or the wiring recharge. | EASY TO INSTALL - No drilling required as placement uses existing license plate holes, with no wiring or having to hire a professional. theft-resistant as the censor is mounted with the license plate. | SMART PARKING ASSISTANT - The Parking Sensor will be in standby mode when you car speed is higher than 25mph or after you have parked your car. | WEATHERPROOF - The Type S Solar Powered Backup Sensor has an adaptive environment technology. This helps protect the radar system from freezing and is solid weather proof.