Features: - With 4 sensors - Advanced chipset for enhanced coverage and detection - Detect small children and low walls as well. Enables you to prevent dangerous and costly collisions - Provides increased safety for passengers, pedestrians and family members who happen to be around moving vehicles. - After tested: All items are checked and tested carefully by our technical department. Description: Product Name: Car Probe Buzzer Reversing Radar Sensor Current: andlt 200mA Input voltage: 12V DC Working temperature: -30-70C Voice Alarm: < 80dB Ultrasonic frequency: 40 KHz Detection range: 0-2.0 m Probe diameter: 16.5mm Packing list: Buzzer x 1 Radar host x 1 Probe x 4 Drill bit x 1 Power cord x 1 English instruction x 1 Note: 1. Due to manual measurement, please allow 1-3cm error. Make sure you don"'"t mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.