The Bose SoundLink Flex 2nd Gen is decent for the outdoors. It's remarkably portable and has excellent build quality, so it's a good choice for park hangs or hikes, especially since its IP67 rating means it'll survive being accidentally dropped in a shallow puddle. You can place it either standing up or lying down, and it will adjust its sound accordingly. If you're on a stroll, you can even attach the side strap to your backpack. Its battery life of roughly six to seven hours will get you through all but the longest hangs and hikes. Nonetheless, this small speaker doesn't get super loud, and its speakers are front-facing, so it doesn't produce 360-degree audio.