This battery adapter for 18V battery convert to for 12v cordless series tools use. Battery adapter can make your 18V lithium batteries use for 12v power tools, and let you enjoy the advantage of extended run-time of Li-Ion Batteries on your existing power tools. Perfectly matched for 18V Li-ion Batteries. Suitable for 12V M12 Cordless Tools. Made of high quality plastics, durable and safety to use.It provides over-voltage, over-current, overheats and short circuit protection. Compatible with for M12 Cordless Power Tool: 2470-21 2471 2471-20 2471-21 2471-22;2590-20 49-24-0145 49-24-0146 C12 D C12 DD C12 HZ C12 IC C12 ID C12 IW C12 PC C12 48-11-2401 2207-20 2207-21 2238-20 2238-21 2239-20 2239-21 2276-20NST 2276-21 2276- 21NST ;2277-20 2277-20NST. Material: ABS colour: Red+Green Package Contents: 1 x RYB18M12 Battery Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.