1.Portable but extremely ruggedly tough and durable bluetooth sound system for your outdoor travel 2.Unbelievable HiFi sound in a small body: 40W of pure audio power with enhanced bass thunders from 3 neodymium drivers. An advanced digital signal processor ensures pounding bass and zero distortion even at low volume 3.Wireless stereo pairing: pair two RockStar MINI together via a single device for big stereo sound. 4.Support playing music from a USB Flash Drive 5.Support Karaoke via the Microphone input 5.Outdoor-proof: IPX5 protection safeguards against rain, dust, snow, and sands. Get incredible sound at home, in the yard, or anywhere else imaginable