It isn't by LG. The 'LG' is the "large" model, and the 'SM' is the "small" model. :-) I have the small model.

Hydra's are less expensive alternatives to Cigar Oasis. Not as good quality in my experience, but YMMV. Avallo is in a different league entirely.

The RH meter in my Hydras are way off, and I'm not the only one who has experienced this. In my case, a 70% reading on the Hydra actually cuts its fan at 78%RH.

I only use the Hydra's in the display humidor (lots of air space and open trays means rapid humidification is needed, along with bead sheet). Coolers and other humi's use beads, bead sheets, and kitty litter.

I like to keep the RH between 65% and 70%.