Battery adapter comes with wire terminals, 30A fuse, screws, etc. Comprehensive accessories make your DIY projects easier, highly suitable for indoor and outdoor use! (Note: Batteries are not included in the shipment) You can confidently upgrade your electric toy cars, remote-controlled trucks, robots, work lights, etc. Wide voltage input: 17V-65V Output voltage: 12V Output current: 10A Power: 120W 1. Connection method Input: Red wire (+): Connect to the adapter's positive terminal (red wire); Black wire (-): Connect to the adapter's negative terminal (black wire); Output Yellow wire (+): Connect to the load's positive terminal (+); Black wire (-): Connect to the load's negative terminal (-); 2. Safety precautions a. The step-down transformer has no reverse polarity protection. Ensure you confirm the adapter's and load's positive and negative terminals before connecting to avoid reverse polarity and damage to the transformer and load; b. The input must ensure sufficient voltage and power to drive the output unit; c. The voltage of the unit driven by the output must match the voltage supplied by the transformer, and the power required by the load unit must not exceed the transformer's maximum load power. Accessories' styles and colors may vary between batches, but this does not affect usability. Color: Yellow & Silver Material: ABS Package contents: 1 set * Lithium battery adapter step-down transformer Only the above package contents are included; other products are not part of the shipment. Note: Light reflection and different screens may cause slight color differences between the item in the image and the actual product. The allowable measurement error is +/- 1-3 cm.