1. It completely conforms to the "Constant current to Constant voltage mode" (CC to CV mode) for Lithium battery charging. The most friendly charging mode for Lithium battery. This mode is very good for your battery's lifetime and health. 2. After the charger start to work, it first enters to the self-test mode. If the battery is abnormal or not match, the charger LED will flash to give you a reminder, charger would notwork too. Safe for charger and all batteries 3. When the battery is fully , the green light will turn on automatically and stop charging at the same time (Automatic power off). The fan automatically shut down too, when the battery is full, would not continue rotating.So would not bother you about fan running at night. 4. Short circuit protection: When the battery is short circuited, charger will not output current, thus protecting the charger and battery. Safe for charger and all batteries 5. Battery reverse connection protection: When the battery is connected in reverse, it will not turn on charging, thus protecting the charger and battery. Safe for charger and all batteries Plug Type:EU Plug,it applies to Indonesia, Germany, France, , Italy and so on Voltage: AC100-240V Color: Black Material: ABS Package Contents: 1x Power Charger Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.