BG-CO₂ Timer

I have not actually used it yet (weather is still chilly) but I would say it is quite awkward to set up. Sometimes good written instructions are needed rather than just short videos on YouTube. I'm sure it will work and I am glad to save CO2 but since you asked.....

Timer displaying status open or closed.

I set up the on/off timings several days ago. Is there an easy way to look at the timer and tell if it is open or closed? (allowing or not allowing CO2 to flow to the trap) I have been using a cup of water to see if bubbles are emitted but would rather look for an indication on the timer display.

Overpriced, very expensive and cheaply made

I'm not even certain that it works.