Charge Qi Enabled Devices Wirelessly By Placing Compatible Device On Top Of Charging Pad. Expand Available USB Ports On Your Computer For Additional Peripherals (Keyboard, Printer, Etc.). Wireless Charging Feature May Not Function With Older USB Ports. Requires Newer USB Ports With Increased Output Capacity (1.5A) For Charging. Not For Use With A/C Adapters (Wall) Or D/C Adapters (Vehicle). 2 High Speed USB Ports. Cord Attached And Stored Within. Output: 5 Volts/1 Amp. Charges Most Phones, MP3 Players And More!.