-small size,big sound -mini & portable,rubber finish -pop-up style -rechargeable -DC power 5V small size big soundModel:KDL- ... Feature,- abs plastic shell- metal mesh grill- rubber finish,- pop-up style- 2W 4ohm speaker- speaker size:40mm- battery:200mah li ... music devices which's a 3.5 eaephone port! Pop-up MP3 Speaker