Review on Waterproof Portable Bluetooth Shower Speaker - IPX7 Rated, Powerful Stereo Sound, Wireless Compact Speaker with Enhanced Bass, 12-Hour Playtime, Bluetooth 4.2 Technology, Mini TWS Speaker for iPhone, iPad, Outdoor Adventures, Biking, and Parties by Brian Cheney

The product itself performs relatively well, but the 12-hour battery life is definitely a stretch. Maybe mine is broken, but a full charge lasts 2-3 hours max. My biggest concern is the fact that it keeps beeping to warn of low battery. For example, when the battery is a little less than half, it will beep continuously until it runs out of power. Considering the battery lasts for around 12 hours, that means I get around 1 hour of listening time and another potential hour of disruptive beeps. For a while I tried to ignore that he had done it. I was willing to just ignore it and accept it because of the low price of the product. However, it got to the point where I hate this speaker and want to throw it out the window. If you keep it charged or on a charger at all times, it's a pretty decent deal. If not, just prepare to have your listening experience constantly interrupted.