From Meris:

Hedra is a 3-voice rhythmic pitch shifter capable of adding 3 harmony voices to your instrument. Tap tempo synchronized delay is also available for each voice. Pitch glide, micro tuning, 4 individual delay configurations, adjustable pitch correction, and midi keyboard control combine to make Hedra an instrument like no other. 

• Selectable Pitch Correction Types to ReVoice your Melodies in RealTime
• Individual Controls for Pitch and Time Offset for each Voice (3 Voices Total)
• Micro Tune control creates gentle chorus-like detuning, classic studio fattening, and extreme warping
• Chromatic or Key Driven Harmony with Selectable Scale Types
• 4 Delay Line Configurations with unique Feedback Routing
• Unique Keyboard Control putting a Live Quartet Under your Fingertips
• Our Original Glide Mode slides between pitches at the speed you choose
• Choice to sweep through Intervals smoothly or hard step for dramatic pitch effects
• Switchable Half Speed and Auto Swell for advanced textures
• Digitally controlled Analog mix control
• Stereo input and output
• Switchable input / output headroom level for Guitar or Synth / Line level
• Expression pedal control over all parameters simultaneously
• Presets available via external 4-Preset switch or MIDI
• MIDI in/out over TRS via the EXP jack (presets, automation, beat clock)
• Premium analog signal path and 24-bit AD/DA w/32 bit floating point DSP
• This item no longer includes a 9V power adapter