This URPOWER weather-resistant indoor/outdoor speaker packs powerful 20 Watt Enhanced Bass. It can pair easily with all iPhones, iPads, Samsung Galaxies and all other Android devices for over 10 hours of wireless music on a full charge. You can use it to pairs two URPOWER Bluetooth Speakers at the same time. Enjoy an impressively crystal clear sound quality and robust bass realized through dual high-performance drivers and a passive subwoofer. The built-in microphone is provided for hands-free calls while the NFC technology entertains an easy and instant connection. There are four languages you can select from while the waterproof, dustproof, shockproof and rugged design will help you use it under any harsh environmental conditions. The Bluetooth V4.0 connectivity with 20W gives you an insanely loud super bass speaker that quickly pairs in seconds within a range of up to 33 feet.