Smile Tunes Non-powered Amplifier for ANY Smart Phone or Mp3 Player - BLACK. Includes Stand; also Mounts on Walls. Works with all smart phones and mp3 players for playing music Fits most mp3 players and smart phones for watching videos Patented Double Horn design maximizes volume and improves sound quality Can be used for conference calls and for the hearing impaired Use with the included stand on any horizontal surface; or mount with non-marring adhesive tape on almost any vertical surface