The Ryobi 15M Green Cross Laser Level incorporates green laser technology which improves visibility by up to 4 times when compared to red laser lines. This makes it ideal for applications such as hanging cabinets, shelving and pictures around the home. It automatically self-levels with an intuitive LED which indicates when the laser is out of level and includes a versatile clamp which can be fixed onto many surfaces. The easy-to-use on/off switch works even when wearing gloves, and the internal mechanism locks the laser in place when powered off to prevent damage during transit and storage. Featuring a built in ¼” Tripod thread for a wide array of mounting solutions suitable for any project. This product requires 2 x AA batteries (included).