1) One piece unit with 4 international adapters. 2) Protects your computer and personal appliances from spikes in foreign electricity. 3) Accepts grounded and ungrounded plugs from dozens of countries. 4) Easy-to-use all-in-one adapter fits electrical wall outlets in the most commonly traveled regions. 5) Exposes only one plug at a time for added safety. 6) Built-in surge protector keeps your electrical appliances safe from spikes in foreign electricity. 7) Input: AC100V~240V 50/60 Hz 0.1A, Output: DC5.0V 500mA 8) Compatible with all USB charging cables. It transforms your Swiss travel universal power adaptor to allow you to charge your PDA, mobile phone, blutetooth headset, iPod and MP3 players through the USB port.