With the 35 Watt Katana-Air EX combo, Boss doesn't just drop a guitar amplifier complete with a wireless guitar system, but by adding various controllers and downloading the BOSS Tone Studio app, offers up close-to complete wireless control. Add gear like the EV-1-WL expression pedal or FS-1-WL footswitch to the setup and gain cable-free access to various functions; pair a Bluetooth capable device to stream music through the built-in speakers and play along; and fully customise your guitar sound via the BOSS Tone Studio app, which is compatible with both iOS and Android. The Boss Katana-Air EX: Big Stereo Sound - for Guitar & Bass This compact combo features two 5 inch speakers housed in a tight cabinet finished with a bass reflex port, supporting full and wide yet tight stereo sound backed up by renowned Katana technology. Five basic sounds come pre-loaded in, but when you start moulding your own custom sounds to shape and save them using the BOSS Tone Studio app, an enormous array of guitar and bass sounds are suddenly on offer. Expand things even further by downloading even more sounds as well as wireless switching settings from the BOSS Tone Exchange community. Over 60 Effects, Recording Functions + 12 Hours of Playing Time You're also granted access to more than sixty Boss-grade effects to really butter up the sound of your electric guitar, your electric bass or even your electro-acoustic guitar - that's how flexible the Boss Katana-Air EX combo is. As well as the app, up to six of your own sound profiles can be saved in the amp to be called up later and, via the fitted USB port, the Katana-Air EX can be directly connected to a computer to record to a DAW while the line-outputs can be hooked up to the mixer during gigs and rehearsals. Finishing in style, this amplifier comes including a Boss WL-T wireless transmitter, giving you up to 12 hours of 100% cable-free playing time. The transmitter also features an energy-saving movement sensor which thoughtfully triggers standby mode after a period of inactivity.