Bat Meter

The Q192 Bat Meter is a dual-space module that gives you a visual indication of a signal's voltage via an analog meter. LEDs provide additional indication helpful for fast-moving signals.

A manual switch selects between one of two inputs and thru jacks eliminate the need for a multiple.

https://www.synthesizers.com/q192.html

• ? mA +15V
• ? mA -15V
• ? mA 5V

No info about availability.