The Parkmatik is a versatile mountable reverse warning system for cars, motor-homes, caravans and trailers. The various implementations offer the right set for every area of application. With 4 respectively 8 sensors even the smallest hindrances will be realised and shown visually and acoustically, which otherwise could not be seen in the blind angle. The sensitivity is adjustable. At vehicles with rear carrier or other overhanging extensions the zero point can be changed. Parkmatik 4 - extension module with 4 sensors to Parkmatik 3 This extension module will be linked to the Parkmatik 3 and contains 4 more sensors for the rear mounting. No cable shifting of the sensors for the LCD-display necessary, because the signal will be transfered via the backup light's cable. The power supply also will be linked via the backup light. Therefore this extension is suitable especially for the mounting at caravans or trailer. The extension with 4 black sensors suits for the fitting or substruction. Technical data: Ultrasonic frequency of the sensors: 40 Khz Operational temperature: -30°C - +80°C Operational voltage: from 10,5 to 28,0 V DC