Worldwide voltage for 100-240V AC -- Also supports Car Kit 12V Adapter (optional & not included)Micro-processor Control - Delta V detection which automatically controls the charging process. Ten independent charging channels for individual charging and detection. Constant charging current mode, trickle current when fully charged. Reverse polarity protection. It automatically terminates charging and the LED flashes red when the polarity is reversely connected. Five hours' safety timer ensures safety.ULapproved AC adapter. SpecificationsAdapter input100-240VAC 50/60HzOutput12VDC, 1500mA Charger input12V DC, 1500mA Output100mA??10% per channel Applicable battery type100mAh~500mAh 9V Ni-MH, NI-CD batteryDownload product manual here.