Slim Compact Design Programmable Track Memory 1-Bit D/A Converter Digital LCD Display - Skip, Search, Play/Pause, Random, Repeat (Repeat 1, Repeat All) DBBS-Dynamic Bass Boost System Battery Recharge Capability with Charge On/Off Switch Automatic Power Off DC 4.5V AC/DC Adapter Jack Requires 2 x AA Batteries (Not Included) 3.5mm Headphone Jack Blister Packaging.