Promotion! DC Automatic Buck Boost Converter DC 8V-40V To 13.8V 10A Step Down Up Voltage Regulator Waterproof Voltage Reducer Input Voltage: 12V/24V/36V nominal, accept(8V-40V) range; Output Voltage: DC 13.8V 10A 138W Maximum Efficiency: greater or equal to 95%; Ripple Wave: 50Mv; Starting delay time: less than or equal to 2S Over-current /Over-load /Low-load /Short-circuit /Over-heat intelligent protection Compact aluminium shell with epoxy potting, waterproof, anti-dust, anti-shock protection and better heat dissipation Widely used to golf cart, motor, speaker, GPS, LED car display screen, air-conditioner, electric fan, solar energy, photo-voltaic power, DVD, industrial equipment ect. Colour: silver Material: metal Package Contents: 1 * DC Automatic Buck Boost Converter Only the above package content, other products are not included. Note: Light shooting 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.