Compatible with Milwaukee M12 12V Lithium-Ion battery. This product includes a built-in fuse to enhance safety for the Milwaukee battery adapter. The fuse helps protect electrical equipment from overcurrent and overheating. Compatibility: Milwaukee 12V (This product does not include batteries; you must provide your own). Note: Installation guide not included. Professional installation is strongly recommended. Please verify the item meets your requirements before purchase. Product design may vary slightly between batches, including minor color or appearance differences, which do not affect functionality. Specification: Black Plug/Blue Plug. Color: Red. Material: Plastic. Package Contents: 1 x Battery Adapter. Other items not included. Note: Lighting and display differences may cause slight color variations between the image and actual product. Measurement may vary by +/- 1-3 cm.