This is a Milwaukee M12 Lithium-ion Battery Charger with model number 48-59-2401. The charger has the capacity to charge 3 Ah batteries with a voltage of 12 V. The color of the charger is red. This charger is compatible with Milwaukee brand power tool batteries that use Lithium-Ion (Li-Ion) battery technology. It is an essential tool for anyone who needs to keep their Milwaukee M12 batteries charged and ready to use. Whether you are a DIY enthusiast or a professional tradesperson, this charger is a must-have item for your power tool and air tool accessories collection.