$775 tyd.
Sorry I missed these messages guys. It has the standard duplex reticle. I'll get some photos of the ring marks, but due to work schedule It won't be till Monday. Really sorry again for not responding back to your questions.
I have a ventless heater in my basement workshop and it's never even registered on my digital Co detector. Also have used a buddy heater in a small camper with no co detected. They definitely ad moisture to the room, consume oxygen, and I feel overall reduce air quality.