Quantity: 1
Modifications: none

From the Blacet website:

A Classic Sounding OTA Based Phaser with Extensive Voltage Control

• Four Stage Phaser with Dual Phase Regeneration Switch for “Classic” or Bright Response
• Input Level Control
• Voltage Controlled Center Frequency
• Voltage Controlled Regeneration
• Built in LFO
• Voltage Controlled Modulation Depth
• External Modulation Input and Mixer for LFO/External
• Dual Out of Phase “Stereo” outputs
• Very Low Noise Design

Download Blacet’s STONZ BASIC MANUAL.

Here are two more photos of the board and the back showing the unusual mounting bracket.