Long-life rechargeable battery with approximately 50 hours of cordless sound and USB port for charging devices Keep in mind we are looking for Bluetooth alternatives that fit an active, on-the-go lifestyle, so we stopped testing speakers larger than the Turtlebox Gen 2 and Bose SoundLink Max. We do not https://www.bluetoothspeaker.top/hot-sale-outdoor-waterproof-wireless-bluetooth-speaker/