VG-6622 Wireless Interconnected Smoke Alarm is developed based on the principle of light scattering, so called optical smoke detector. It has reliable performace and very easy for intallation, same as other smoke alarm. Nevertheless, the most attractive feature of VG-6622 is the wireless connection amount detetors, as well as a remote control device. The wireless linke is available upto 100m in open field. Percise and efficient cirsuit design makes its power consumption in a low level. So the prodcut service life is upto 10 years. It is a ideal solution for room, house, flat, villa, small building and special application without need of cables.