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 them separately). Note: Installation guide is not included. Professional installation is strongly recommended. Please verify the item meets your requirements before purchase. Product design and appearance may vary slightly between batches, including minor color differences, which do not affect functionality. Specification: Black Plug / Blue Plug Color: Red Material: Plastic Package Contents: 1 x Battery Adapter No other items included. Note: Due to lighting and display differences, the actual color may vary slightly from the image. Measurement error is +/- 1-3 cm.