Input: 100-240VAC 50/60Hz 2A, Output: 42V 1.5A, Only suitable for 36V battery. Interface size: 5.5mm(0.21inch),2.5mm(0.10inch). Cable length: 98inch (2.5m). Display Light: Red means the charger is working on charging battery. Green light means the battery is fully charged and the charger should be disconnected. Safety Protection: 1. Short circuit protection: The charger cannot work when output short circuit. After the output returns to normal, it will self-recovery. 2. Over current protection: Charger maintain constant current output, no overcurrent phenomenon. 3. Overheating protection: when the charger temperature is too high, it will not continue to heat up, but Hip-cup mode protection will appear. User Attention: The connector DC Port Inline. The maximum operating temperature is 45℃. Do no overcharge or charge overnight. Please remove the charger when the indicator light turns green. Trained person only.