The KoolMax can play and stream music from any Bluetooth-enabled devices wirelessly in 30+ feet. The sound system offers 350 watts maximum output power with two 6.5 passive Hi-Fi outdoor speakers and two high performance 2 tweeters. The KoolMax can perform as a pro-grade PA system by providing XLR microphone input, and 1/4 instrument input, 3.5mm auxiliary input, USB data and charging port and SD card slot. iPad or tablet can be safely placed in the top compartment and cell phone also can be stored and charged at the same time in the water resistant slot in the front panel. Advanced insulation technology keeps ice frozen for up to 3 days. It holds up to 28 of 12 oz. bottles or 48 cans.