The H9 Harmonizer Effects Pedal with Bluetooth Control from Eventide is a multi-effect guitar pedal that can house effect algorithms from Eventide's ModFactor, PitchFactor, TimeFactor, and Space stompboxes. It also stores its own exclusive algorithms. Every effect parameter, preset, and system setting can be edited via the single-knob interface or via Bluetooth with your iPod, iPhone, iPad, or computer equipped with the free H9 Control app.

The H9 has an "active" footswitch for engaging and bypassing the unit, as well as a tap tempo footswitch for controlling time-based effects. It includes dual 1/4" TS analog inputs and outputs, in addition to a 1/4" expression pedal input for integrating an expression pedal or auxiliary switch. The mini-USB port not only provides access for editing effects with your Mac or Windows computer, but also provides MIDI input and output. The pedal comes with a coupon for a free additional algorithm, and furthermore, you can "MAXOut" the H9 at any time—meaning you can upgrade it to a state in which all current and future algorithms will be yours for the using.