Charges up to 16 iPads, iPods or iPhones simultaneously, providing each USB port with the optimum charge level for Apple devices (2.1A, as needed for quick-charging iPads). This device will also charge many other devices that can be charged through a powered USB port (not a "universal" USB charger). Compact, durable, easy to use form factor can be mounted on or under a desk or counter or inside a cart. State of the art USB charging board created by Cambrionix. Includes a ventilation fan and a UL-listed dual voltage power supply. Power supply specification: input 100-240V, ~1.2A, 50/60 Hz; output 12V, 8.33A) Dimensions: 6.75"L x 3.75"W x 2.2"H. The best professional quality USB charging hub for iOS5 Devices.