Features: 2-Ports USB charger, support Max 5V/3.1A output, can charge for two devices at the same time. LED display to show the voltage, current and Temperature alternately by each 20 seconds. ABS material, durable, not deformed. Built-in intelligent management chip, PTTC over-current protection, effectively prevent overcharge and short circuit, safe to use. Auto power off while the input current or output current is greater than the safety current, please plug out will working again.