Simple and functional loop system, the One Control White Loop. - Model Name: White Loop | Minimal Series (Flash/Loop System) - Brand Name: One Control - Connections: RETURN, SEND, DC IN, DC OUT - Switch Type: LOOP ON/OFF, GREEN/RED Thank you for looking. This is a loop switcher that can switch between two systems. Not only can you switch, but you can also turn it OFF and go straight to the amp. Easy to use ◯ Comes with the unit and the box. Get it if you want it!!(´д｀)