The D1812 also comes with an AC adapter and a rechargeable lithium-ion battery that provides around 2 hours of playback (power consumption depends on the operations of the player, such as screen brightness, volume level, etc). Perfect for road use, D1812 includes a vehicle DC power adapter so you can save batteries on long trips. Listen through the unit's built-in stereo speakers or through headphones (not included). With the battery pack attached, the unit measures 8 x 1.6 x 6 inches (W x H x D) and weighs 2 pounds.