SMAKN&reg; Waterproof DC/DC Converte 12V (9-23v) Step Up to 24V/10A 24V 10A 240W Power Supply Module Powered by SMAKN advanced technology. Widely used in Car device, such as LED Display, Hard Disk Player, MP3, DVD, GPS, etc, All epoxy sealed containers with Waterproof Housing; Used in vehicles, security systems, telecommunications, medical equipments, instruments etc Input range:DC 12V (9-23v),Output voltage:24V/10A/240W.High efficiency:&gt;90%.Reliable, low heat dissipation max. 40 C; With overload / over-current / over / low voltage protection, stable performance. Light compact, convenient to use and transport; Auto recovery