... ,RoHS 5V 3.1A Dual Usb Port Auto Usb Charger 1.small size,portable2.With USB 2.0 port for all mobile charging 3.12 months ... the safe certification standard.5). high working efficiency: ≥95%, good charging performance.6).Overall quality test before factory such as ... short circuit protection, OCP, OVP, Hi-pot, Resistance, burn-in/aging, temperature shock,drop test,vibration test etc.Product pictures: ...