Bascically a brand new unit.  Just didn't use it like I thought that I would.   $469.99 on guitar center.  $300 takes it home.  

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• Totally wireless guitar amplifier with newly developed BOSS technology delivers rock-solid sound with ultralow latency
• Custom wireless transmitter plugs into any electric guitar and charges while docked in the amp
• Transmitter provides 12 hours of playing time on a single charge, and automatically enters standby mode to conserve the charge when no activity is detected
• Always ready to play, with motion sensing technology in the transmitter that instantly wakes the amp from power-saving standby mode
• Premium tones derived from the Katana stage amplifier series, with five unique amp characters and access to over 50 world-class BOSS effects
• Six onboard memories for storing favorite amp and effects setups
• Powerful stereo speaker system with full-range sound and up to 30 watts of power*
• Edit and organize tones wirelessly with the BOSS Tone Studio app for iOS and Android mobile devices
• Play along with music streamed wirelessly from a mobile device via Bluetooth
• Amplifier powered by eight AA-size batteries or included AC adapter
• AUX in for connecting wired devices, plus headphones/recording out for silent practice and music production
• *The Katana-Air produces 30 watts of power when connected to AC, and 20 watts of power when running on batteries