Work with Makita Bosch Milwaukee18V Li-ion Battery.The red wire is connected to the positive battery terminal, and the black wire is connected to the negative battery terminal.Easy to install,locks on you battery very well.Adapter has 15 inches of 14 gauge wire installedSuitable for high power applications.Specifications:Color: BlackBattery Voltage:18 VItem size:95x74x33mmItem weight:80gPackage included:1 x For Makita Bosch Milwaukee Bttery AdapterNotes:1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.2. Please allow slight dimension difference due to different manual measurement.