The adapter comes with the MARK 2 air conditioner. But if you want one more to charge the 24V MARK 2 battery separately while using the original one powers the system of ZERO BREEZE air conditioner MARK 2, then you can buy it. It works on any standard voltage worldwide (100V - 240V AC input). RoHS, CE, and FCC compliant. The wall connector is for the standard of the US. Specification Model JLY2401000 Input 100-240V ~ 50-60Hz Output 24VDC 10A Size 7.8"L x 3.5"W x 1.7"H Weight 2.31lbs Input Connector 3Pin Stand-by power consumption = 0.5 Watts Operating Temperature 32-104? Relative Humidity 5%(32?)~90%(104?), Battery Charging Power 150w Peak Power 260w