... Voltage: DC10-30VWorking temperature:-40 to 50 Celcius degreeLifespan: over 30,000 hours.Water Resistant Functions :One negative and one positive ... power supply, then the product is lighted up immediately. Applications:LED work light for boat,bus,offraod vehicle,atvs,truck,engineering vehicles(excavator ... , quicker; bigger quantity, please check. Limited Warranty:1 year HOT! LED WORK LIGHT LED830W