US Blues Round Portable Guitar Amp. The USB-A40 is a 4 watt battery operated (or AC plug-in) portable guitar amplifier.

Features include:

• Exclusive round casing
• 4 watts of power
• 4" Speaker
• Metal speaker grille
• Rubber vintage style amp handle and rubber feet
• Headphone jack (cancels speaker)
• Volume, Gain and Tone controls
• Switchable distortion button
• Operates on 9-volt battery or optional AC adapter (# USB-AC9)
• Comes in 3 color options: Black Tolex, Vintage Tweed, Pink Leatherette.

*Special feature; Plug in your Ipod or MP3 device using a stereo 1/4" to 1/8" jack for a powerful sound explosion.