I have two of these. $50 each which includes shipping in CONUS. both come with box, manual. Two loops and two 9v dc power outlets available on each pedal. excellent condition. edit- one of the pedals has sold. One still available.
Here is info from one control website- 2-Channel Loop Switcher Players can connect multiple pedals into each loop to create two independent effect chains. Footswitches provide control over 2x independent send/return loops A great solution for bypassing vintage effects while they are not in use, which often have a buffer that can get in the way of your signal chain. Different Uses: AB Switch Amp Channel Switcher Tuner Output/Mute Switch 2x DC outputs to add extra power to your pedalboard The Black Loop can be used without DC Power (4mA), however the LEDs will not function.