Feedback Looper
The compact latching feedback looper is a simple feedback looper with its footswitch only applying feedback. It has a hardwired loop that requires a device in its loop in order for signal to pass through. The switch features an LED indicator to let you know that the feedback switch is on and a level knob to set the feedback. It is a passive design and the power only makes the LED light up.
https://saturnworkspedals.com/product/feedback-looper/
This Pedal is currently available.
$59