I seem to recall buying this in the late 80’s. However Ai says the serial number is from 1992. I’ve found Ai to be inaccurate on many guitar items. Anyway, we can all agree, early Ibanez effects were made by Maxon and are coveted and sought after. This one still has the plastic shipping protector on it. I took pics of every pedal phase to show you everything works. The adapter was $15 but I’ll include it!
Specs:

The PUE5 lets you operate in two distinct modes: Set Mode (using the heavy-duty plastic switches to stomp individual effects on and off like a traditional pedalboard) and Mode Select (which allows you to program and instantly recall 5 completely customizable patch combinations across the switches).

• Compressor: Warm, classic 1980s analog compression based on the sought-after Maxon CP9 circuit architecture. Controls: Attack Time, Sustain, Level. [1, 2]
• Distortion: High-gain analog drive section voiced similarly to the classic Ibanez Power Series / Soundtank circuits of the era. Controls: Drive, Tone, Level. [1]
• External Loop & Noise Reduction: Built-in switchable threshold noise gate alongside an independent external effects loop to integrate your other favorite outboard pedals seamlessly into your programmable patches. [1, 2]
• Digital Delay: Pristine digital delay unit offering an expansive delay range from 16ms up to 1024ms. Controls: D-Time, Repeat, D-Level, and a 3-way Range