The parking sensor set is a perfect gift for any driver. Universal ultrasonic 4-sensor parking sensors with built-in buzzer that transmits an audible signal, increasing its sound frequency as the distance from the obstacle decreases. Key features: Ideal system for improved reversing and parking safety Up to 4 sensors for wide placement for better obstacle detection coverage on the road Buzzer giving an audible warning signal of an impending obstacle Built-in switch that allows you to mute the system or set one of two volume levels Easy installation with included drill bit with foraminifera and clear instructions The set also includes the necessary wiring, accessories and control panel Specification: Rated Voltage: DC 12 V Operating voltage: DC 9 - 16 V Intensity: 20 - 200 mA Obstacle detection distance: 0 - 2,5 m Ultrasound Frequency: 40 Khz Power cord length: approx. 80cm Cable length to speaker: 490cm Cable length to sensor: 220cm Ambient temperature range: -30C70C Number of sensors: 4 pieces Sensor hole diameter: 22mm (drill with foraminifera included) The package contains: Four ultrasonic sensors in red Buzzer Control unit Necessary wiring and accessories Drill bit with foraminifera Operation and assembly manual in Polish