AC Power Adapter 120V, 240V / 12V-1A / 5.5mm-2.1mm
UL approved Switching Power supply.  Input Voltage: 120V, 240VInput Voltage range: 100V-240VInput Voltage frequency: 50hz, 60hzOutput Voltage: 12VoltsOutput Voltage Range:  Minimum 11.4V, Maximum  12.6VOutput Current: 1AmpCord Length: 1.5metersConnector: 5.5mm Outside Diameter, 2.1mm Inside Diameter, 10mm Long, Center positive.Minimum Efficiency: 77.75% @ 115Vac/230Vac input and output at full load.Over-Current/Short Output Protection: The power supply will withstand a continuous output short.  Normal operation will resume when the short is removed. Lead Free & RoHS compliantNote:  Standard power supply tip sizes are (OD - Outside diameter, ID - Inside diameter): 5.5mm OD/2.5mm ID, 5.5mm OD/2.1mm ID, 5.0mm OD/2.5mm ID, 3.5mm OD/1.3mm ID.  This power supply comes with a 5.5mm OD / 2.1mm ID tip.