Kastar V-Mount Charger: Worldwide voltage Input: AC 110-240V 50/60Hz 0.8A DC Output:16.8V-3.0A Charger indication Green lights for standby, Red is for charging. Which can prevent the overcharge and overdischarge. Fast charge with automatic constant current control prevents battery from overcharging, short circuit, and electronic shock. Build in MCU, automatically stop working when improper input voltage, short circuit or overheat.