PowerBlock Universal is the space-saving, 3-port wall charger for all tablets, smartphones, e-readers, and wearables. | Built-in ChargeSensor technology detects your device's charging requirements | Delivers the level of charging power at the rate it needs for fastest, safest charging. | PowerBlock works with any standard 100 to 240 volt AC wall outlet | With 3 USB ports in a space-saving configuration and folding outlet blades, PowerBlock 3-port Universal is a luggage-friendly travel companion.