This adapter will let you plug into a US 2-prong power adapter in the following locations:

American Samoa, Argentina, Australia, China, El Salvador, Fiji, Guatemala, Kiribati, Nauru, New Zealand, Panama, Papua New Guinea, Saint Vincent and the Grenadines, Tajikistan, Tonga, Uruguay-- and also the city of Okinawa, Japan.

Compatible with all the power adapters Adafruit carries as all are 110-240V compatible!

• 5V 1A (1000mA) USB port power supply
• 5V 2A (2000mA) switching power supply
• 5V 10A switching power supply
• 9 VDC 1000mA regulated switching power adapter
• 12 VDC 1000mA regulated switching power adapter
• 12V 5A switching power supply

Note that this does not contain a transformer, its not going to transform 120VAC to 220VAC, its only a mechanical adapter so its only for use with devices that are OK with 220VAC!

Weight: 10.3g