Compatibility: The DC power adapter works with 20V Li-ion battery(Battery NOT Included).We focus on providing reliable tools. You can save money on the battery and charger if you already have them before Upgraded Low Voltage Protection: This voltage converters built in over low voltage protection, auto shut off if the battery voltage is lower than 14.4v, protect your 12V devices from over power. Max output current 12V/15A High Quality Material & Safe to Use: The automatic buck converter is made of high quality chip and high quality plastic, stable and safe. This inverter is , can let you enjoy the fun of DIY Widely Application: IWide voltage input: 17V~55V, output voltage: 12V, output current: 20A, power: 240W widely used in motor, dashcam, car truck, vehicle, golf cart, led strip light, electric fan, camera, light, screen, monitoring system, solar pad and DIY etc. 1. Wiring Input Red wire (): Connect the positive pole of the adapter (red wire); Black wire (-): Connect the negative pole of the adapter (black wire); Output Yellow wire (): Connect to the positive pole of the load (); Black wire (-): connected to the negative pole of the load (-); 2. Things to note 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 the 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 converter, and the power required by the load device cannot be the maximum carrying power of the converter; Colour:yellow+silver Material:plastic+metal Package Contents: 1 x voltage regulator (battery not included) 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.