2.1 outdoor active Speaker with 4 inch subwoofer Output very clear sound and heavy bass,dynamic sound effect Stream music from any device such as your mobile phone, notebook IPhone or IPad Secure simple pairing for user-friendly operating 10 meters operating range TF Card Function FM Radio Function Line-In Function U Disk Function Built-in lithium rechargeable battery 1800mAh Pulsating LED Light Shoulder Strap for comfort SPECIFICATION: Horn Size-2 inch Subwoofer output-400watts,4Q Subwoofer Size-4inch Battery Capacity-1800mAh Horn output-150watts,4Q Power supply-DC 5V