The battery adapter comes with wire terminals, 30A fuse, screws, etc. Rich accessories make your DIY work easier, very suitable for indoor and outdoor use! (Note: Batteries are not included in the scope of supply) You can safely upgrade your electric wheel toy cars, remote control trucks, robots, work lights, etc. Wide voltage input:17V-65V Output voltage:12V Output current:10A Power:120W 1. Wiring method Input end: Red wire (+): Connect to the positive pole of the adapter (red wire); Black wire (-): Connect to the negative pole of the adapter (black wire); Output end Yellow wire (+): Connect to the positive pole of the load (+); Black wire (-): Connect to the negative pole of the load (-); 2. Precautions a. The buck does not have a reverse connection protection function. Please be sure to confirm the positive and negative poles of the adapter and the load before wiring to avoid reverse connection and burning the buck and load; b. The input end must sufficient voltage and power to drive the output device; c. The voltage of the device driven by the output end must be the same as the voltage output by the buck, and the power required by the load device cannot be the maximum load power of the converter. The styles and colors of accessories from batch to batch, but it does not affect the use. Colour:Yellow & Silver Material:ABS Package Contents: 2 set x Lithium battery adapter step-down 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.