Proxelle Surge Mini Pocket Size Waterproof Bluetooth Speakers Portable Mp3 Player Wireless Speaker Systems Green Crystal clear sound quality: Better-than-ever-before Bluetooth 4.0 technology and aux audio input gives a big voice to this mini speaker Ultra portable: Small and lightweight weighing only 7 ounces and 4.3 inches long, you can easily slip this powerful speaker in your pocket or purse Both Apple and android devices pair up with this speaker in seconds - and even better, you can connect up to two devices at the same time