Yamaha THR5A 5-Watt Acoustic Modeling Combo Amplifier Bundle with Instrument Cable, Pick Card, and Polishing Cloth Four acoustic mic simulations and one clean amp modeling for electric guitar. THR incorporates Yamaha's new Extended Stereo Technology to create an incredibly wide, spacious audio image THR's two-way power supply lets the unit operate on AC (PSU supplied) or battery power. THR is bundled with Cubase AI, Steinberg's professional music production application that offers full-fledged recording and editing. THR's design provides stereo playback from your smartphone or other device through its AUX jack or direct from your computer via the USB connection.