Wire length 400 +/- 10mmworking principle: Connect this product to compatible the 18V lithium-ion battery, and use two wires to draw out the battery compatible use by other devices of the same voltage, as a helper compatible DIY players, such as small DC fans, heating clothing, electric toy modification, etc...colour: as shownMaterial: plasticPackage Contents:1 x Battery AdapterOnly the above package content, other products are not included.Note: Light 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.