Hi - I already own one but just wanted to say if anyone is buying do so from Premium Aquatics.
I purchased some ESV 2 part two weeks back. Fair price, shipped on time. No fault of their own the delivery team in my area and/or pilots in route roughed it up two different ways to Tuesday and damaging both bottles. Quick note to PA and they messaged me on the same day and offered a refund, replacement with extra packaging, and said if anything is left to salvage (there wasn't) to keep it. Got a replacement, packaged very well, in three days.
Seneye is a great product as a reference and par meter. Affordable. Just giving a shout out to the lads and lasses at Premium. I thought they did a great job. Sorry if this derailed it but it caught my eye so figured I'd lay it out if anyone is thinking of buying elsewhere.