Compatible with Milwaukee M12 12V Lithium-Ion battery. This product includes a built-in fuse to enhance the safety of the Milwaukee battery adapter. The primary function of the fuse is to protect electrical equipment from overcurrent and overheating. Compatibility: Designed for Milwaukee 12V batteries. (Batteries not included; must be provided separately.) Note: Installation guide not included. Professional installation is strongly recommended. Please verify the item is suitable for your needs before purchase. Product design may vary slightly between batches, including minor differences in color or appearance, which do not affect functionality. Specifications: Black Plug/Blue Plug Color: Red Material: Plastic Package Contents: 1 x Battery Adapter (Other items not included.) Note: Due to lighting effects and monitor settings, the actual color of the item may vary slightly from images. Measurement may vary by +/- 1-3 cm.