BAL DC/DC Converter 3A 1770 Set of 4 for sale. Unused, new, and unopened. How about using them to install a drive recorder in your company car? ■ This device converts the power supply (DC24V) of large vehicles (trucks, buses, construction machinery, etc.) to DC5V/DC12V. ■ With USB port ■ Two types of power can be used simultaneously. (DC12V + USB, total 3A) ■ Red lamp indicates when the protection circuit is activated ■ Equipped with 5 types of safety protection circuits Input voltage: DC24V Output voltage: DC5V/DC12V Rated output: DC12V + USB, total 3A or less Power input method: Accessory plug connection Protection circuits: Low voltage input protection circuit, high voltage input protection circuit, output overload protection circuit, output short circuit protection circuit, high temperature protection circuit USB output: DC5V 1A USB port type: Type A Cord length: Power cord: 900mm (effective length) Body size: 50(W) x 39(H) x 80(D)mm Weight: 140g (including power cord and accessory plug)