HTC Evo 4G Extended Battery Silicone Case White + Wireless Bluetooth Dongle Adapter Designed specifically for the HTC Evo 4G extended battery and cover. Access to all phone functions, sync/charge & headphone jacks. Open access to speakers, microphone & camera Increased grip and washable case helps to keep your phone looking like new. Wirelessly connect to Bluetooth devices such as mobile phones or PDAs for data transfer, networking, fax, and all sorts of other tasks, Enable wireless connection to Bluetooth headset Supported Operation system : Windows 98, 98SE, ME, 2000, XP, VISTA