The AT402 manufactured by Leica is a 3D absolute laser tracker which is quick and easy to use. It has a compact, IP 54 rated, all-in-one design that is equipped with a built-in live video, environmental monitoring, level to gravity and an IR remote control. The device only weighs less than 33 lbs and can be operated wireless as it utilizes WiFi. It is highly durable that the sensor can be used in the toughest conditions even in wet environments. It utilizes the PowerLock from Leica Geosystems which makes it capable of tracking its target even while it moves as it locks the laser beam once on any reflector it detects.