Extremely satisfied with this product. First one of this caliber ever. Always borrowed a friends when golfing or disc golfing. The sound quality is exceptional even at 75% plus levels. The battery lasts 7.5 hours at three clicks less than highest phone level setting on my android stylus. I've taken it to the beach, the river, golfing, disc golfing, the steam room, the sauna, this thing is not phased by the environment you bring it to. I've dropped it in the river while crossing and had to dive down 5 ft to get it and it was still playing music after that and years later. The Bluetooth technology is great and can link to multiple devices, I think 2 or 3 devices at a time. It's very durable and has a clean look. It fell from the hood of my truck and sounded unpleasant but keep bumpin. I have only experience distorted sound when the battery level gets so low the red low battery level light illuminates and I'm trying to increase the volume, otherwise its a great bang for the buck.