Features: The circuit without temperature increasing, short circuit protection and the over-flow protection let you use it safely and easily. Mini Dual USB car Charger; High efficiency; Safe and reliable; With corresponding USB connection cables, charging for IPOD, IPHONE, IPAD, GPS, smart phones and tablets, etc.; Type: Double USB Car Charger; Input: DC 12~-24V; Output: 5V=3.1A(max); USB Port: Double Ports; Working temperature: -10~50'C