All-in-one switch fuse device. The switch ensures you can turn on&off the battery easily. After the switch is turned off, the risk of a short circuit caused by a wrong connection can be avoided. Added 30Amp fuse voltage overcurrent protection.Battery Adapter for ONE+ 18V battery adopt superb craftsmanship which the size measured and controlled strictly, so that the battery converter compatible with the battery perfectly.Compatible with over 225 ONE+ Tools - All Work With for Any 18V ONE+ Battery: RB18L50, BPL1820, BPL-1820G, BPL-1815, BPL-18151, P102, P103 P104, P105, P106, P107, P108, P109.Easy to use, just move the mount connector to the inside of the groove gently, then install the battery into the connector. The red wire is connected to the positive battery terminal, and the black wire is connected to the negative battery terminal. wheels adapter has installed 12 gauge wire. Enjoy yourself in DIY You can use it to upgrade your wheels, toys or Robotics DIY, high application and etc.Color: greenmaterial: plasticPackage Contents:1x Battery Adapter3x 30A fuse replacements1x push-type quick terminal blockOnly 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.