http://www.rolandconnect.com/product.php?p=mobile_ac
Your First Acoustic Guitar Amp
If you're new to the world of acoustic guitar and would like to explore an extra dimension in sound, creativity, and convenience, the new MOBILE AC is your perfect amp. Optimized for acoustic guitar and designed to travel, the MOBILE AC delivers big sound in a package that can easily fit into a backpack. The amp can be used for up to 15 hours at a time via battery power, so you can take it anywhere. Simply plug in your acoustic guitar, turn up the volume, and enjoy clean, clear, and surprisingly powerful, spacious stereo sound from a compact amp. You can also add deep stereo chorus or lush reverb effects, and you can incorporate a portable media player and microphone for sing-along fun. Strum your guitar and sing, play along with backing tracks, and enjoy the MOBILE AC at home or outdoors. It's also a handy personal monitor for use on stage, with a big sound that defies its small size.