This is a set of car immoblizer system. Its smaller, the remote control is light and thin, and the new micro-electric technology brings you more ty and installation is very simple, directly unplug the oil circuit fuse in the engine compartment of the car, and plug our main unit directly into the repl ment to complete the installation. Just fix it and cover the engine cover and you can use it. The remote control comes with Auto-sensing function, no need to operate, you can put the remote control in your wallet or pocket, no one will notice, you can refuse gr fully bor g car from s, or ing thieves from ste ng car. Specifications: Unit working vol e: 12V3V Unit quiescent t: 12mA Unit control t: 30A Remote control operating t: 38mA Remote control standby t: 1uA Remote control specification: CR2032, 3V, 240mAh Remote control frequency: 433.92MHz Unit size: 48 * 26 * 15mm / 1.9 * 1.0 * 0.6in Remote size: 33 * 33 * 5mm / 1.3 * 1.3 * 0.2in Package size: 165 * 92 * 48mm / 6.5 * 3.6 * 1.9in Package weight: 200g / 7.1ounce Packing List: 1 * Host Unit 2 * Remote Controller 1 * User Manual