Very well made, works wonderfully. The USB powered straps from other makers have nowhere near enough heating. I do wish they'd give the overall length of these straps instead of the slightly less helpful scope sizes they fit. I like the velcro attachment with the stretchy elastic band to put just a little tension on the fit, and the cord placement on the outside of the strap. And made in the USA!
It worked as advertised. It's a must piece of equipment if you live in a humid climate as I do. It can save night's session.
Works great so far and works on scopes from 50mm to 80mm
This dew heater is really well-designed. The band is elastic, which ensures a snug fit. Also, the wire exits near the Velcro closure, which allows it to be routed easily to the dew controller.