Yamaha AA5 Portable Monitor Stereo Instrument Amplifier Overview: The Yamaha AA5 is a versatile, portable stereo amplifier with various uses. It's the perfect companion for Yamaha's popular Silent Guitar series, keyboards, and other electronic instruments. In addition to a 1/4 in. instrument input, AA5 has a stereo input for CD and MP3 players; great for practice and jamming. AA5 has an innovative digital power section that provides 5 powerful watts to its stereo 4 in. speakers; 4 AA batteries enable 12 hours of playtime! A Line Out jack is provided to feed recording gear or a P.A. system. AA5 can be easily mounted on a camera-style tripod for convenient placement. Features: Solid construction Digital Power Amp: First in the category digital power section Power: 5W Speakers: 2 - 4" Solid Construction: Takes a lickin', keeps on crankin' Portable: Small, light, perfect amp companion Mounts on a camera-style tripod Stereo: Loves CDs, MP3s, and Silent Guitars Battery or included power supply: 4 AA's last 12 hours, or use included power supply Playtime: 12 hours per set of batteries Inputs: 1/4" / aux in Outputs: line out jack Specifications: Brand: Yamaha Manufacturer: Yamaha Shape: Square Vibe: Cool Purpose: To amplify in stereo Amp type: Digital Power: 4 AA batteries Playtime: 12 hours Inputs: 1/4 in. / Aux in Output: 5 Watts