Intec's Theater to Go delivers unbelievably rich sound in one compact unit. Speakers are integrated into inside lid, keeping a low, protective profile. Rechargeable battery is integrated into bottom base, giving you up to four (4) hours of extra PSP play time (that's a total of up to 8 hours!). PSP is secured in an internal cradle with locking system, which provides various secure viewing angles. Unit includes line-in connection to connect any MP3 or DVD player for amazing, crystal-clear sound. Power with your existing PSP AC adapter.