Features 1.Support for Google / Android ADK, supporting mobile phone: For G1, for Nexus One, for Nexus S, for Motorola Droid X. 2.Phone systems need to upgrade to for Android 2.3.4, tablet systems need to upgrade to for Android 3.1. 3.Provide compiled APK installation package and ADK source file. 4.Compatible with following hardware: For 328, For Diecimila / Duemilanove 328. 5.After achieving for USB HOST function, can communicate with other USB devices, and support USB HUB function. Specification Features: 1. Support for Google / Android ADK, supporting mobile phone: For G1, for Nexus One, for Nexus S, for Motorola Droid X. 2. Phone systems need to upgrade to for Android 2.3.4, tablet systems need to upgrade to for Android 3.1. 3. Provide compiled APK installation package and ADK source file. 4. Compatible with following hardware: For 328, For Diecimila / Duemilanove 328. 5. After achieving for USB HOST function, can communicate with other USB devices, and support USB HUB function. Specification: Item Name: USB Host Package List: 1 x USB Host Package List