1.Design is simple, durable, convenient. 2.Product built-in battery lock fixed combination . 3.Built-in Protection Board(PCBA) for battery discharging. 4.Applicable models: 18V/20V 5.This conversion adapter converts for BL1820 BL1830 BL1840 BL1850 BL1415 BL1420 BL1815 BL1860 BL1830B BL1840B BL1850B BL1860B to 18V/20V It allows your 18V/20V max tool to share batteries with Power Tools, saving money. For a long time do not use, please separate from the battery. This converter does not support the ability to charge the power . colour: black Material: ABS size: 94x73x45mm Package Contents: 1 x Conversion Adapter Only 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.