Blackberry 8800 8830 PDA 3-In-1 USB Hot Sync Cradle Twin Desktop Charger w/ Battery Slot 3-In-1 Features: Synchronize, Charge Phone and Charge Extra Battery. Synchronize & Charge phone with USB cable. Charge extra battery with AC adapter. The cradle holds PDA at a comfortable reading angle and provides convenient access on desk. Portable design and convenient for travelers and business users. USB data cable & ac adapter include USB cable sync & charge phone ONLY. AC adapter charge 2nd battery ONLY