ITEM NAME:12V To 9V 2A 18W DC To DC Buck Step Down Module Car Auto Charger Converter Product Description Description: 100% Brand new and high quality Module Properties: non-isolated buck module (BUCK) Rectification:synchronous rectification Input voltage:DC 12V (12-22V) Output voltage:9V Output Current:2A Output Power:18W Conversion efficiency: Max 96% Working temperature: Industrial-grade (-40 Â °c to +80 Â °c) Overcurrent, overtemperature, short circuit protection Waterproof, moistureproof, suitable for most kinds of harsh environments Small size: Approx.30x25x21mm (do not including install ear) Cable length:Approx.14cm Color:As shown Included: 1x Car Charger Converter.If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item. Mon. to Sat.