Hope to get a pre-order going next month for the Air and the Sky units. I’ll operate them in parallel with my existing sensors to see if they track well. I’ll compare the Sky against my R.M young 05103, The Sky Haptic rain sensor against a oldie but goodie Handar 8" tipping bucket, the Air temp/humidity against a Vaisala temp/humidity transmitter. My Pyranometer quit on me over a year ago, and at a replacement cost of $170.00 or so wasn’t worth it. I believe the lightning detection is a AS3935 lightning detector chip or similar used in an Acccurite pocket detector (about $30.00 on Amazon (mine works pretty well and also a detect range of about 25 miles, so probably basically the same thing).