COOLM 12v 500ma AC to DC Power Supply Adapter 100-240V 50 60hz to 12V 0.5A AC Adapter with 5.5mm x 2.5mm DC PlugHow do I choose an adapter? 1. Adapter connector(5.5x2.5mm DC Jack) matching with the device. 2. The output voltage(DC 12V) of the adapter must be the same as the rated input voltage of the load (mobile device), or within the acceptable voltage range of the load (mobile device), otherwise it may burn the load (mobile device). 3. The output current (0.5A) of the power adapter should be equal to or greater than the current of the load (mobile device) to provide sufficient power.Specifications: Item: Power adapter Input: AC 100-240V Output: DC 12V 0.5A Power Wattage: 6W DC Jack Converter: 5.5mm x 2.5mm, compatible with 5.5mm x 2.1mm DC port. DC cord Length: about 3.6FT/ 110cm AC Plug: US Wall PlugProtective function:Short circuit protection. The power supply can resume normal operation when the short circuit is removed.Overcurrent protection. After the overcurrent fault is removed, the power supply will automatically resume normal operation.Overvoltage protection. When the output voltage exceeds the rated voltage, the power supply will be protected and normal operation can be resumed after the fault is removed.Package: 1 x 12V 0.5A Power Adapter with US wall plugNote: Please make sure the 12V 0.5A 5.5x2.5mm ac adapter could fit your devices, any question or need, please feel free to contact with us for help. Thanks!