The Rolsen music audio system RBM-312 is perfect for taking along to the beach, parks or even in your car. A built-in speaker and built-in handle make this super easy to take on the go wherever you want to have some tunes. And to listen the powerfull 25W sound. A build-in FM tuner lets you catch up on the news, check the weather, or take in your favorite morning show while you get ready for your day. MP3/WMA files can be played easily from USB-flash or SD/MMC cards. The 3.5mm audio line input jack allows you to plug in external devices to play your music through the speakers on this system. It also has microphone jack. So it can be used as a loud-speaker. Due to comfortable microphone it project your voice across the field or the conference room easily that so you can get everyone’s attention fast. Lithium-ion rechargeable battery provides up to 4 hours of wireless play - no need to buy batteries. The power cord makes it easy to recharge the battery.