This is a top-of-the-line Milwaukee 3632-21 M12 Green 360-Degree 3-Plane Laser Kit that comes with a 4.0 M12 XC4.0 battery and charger. The laser emits a bright red beam that is perfect for measuring and marking tools. The kit includes everything you need to get started, including batteries and a case. With its advanced measuring technology and accuracy of +/- 1/8 inch at 33 feet, this laser kit is perfect for both indoor and outdoor use. Its green color adds a stylish touch to your toolkit.