Amazon has this meter on sale, after on-line coupon clipping, for $7.99. I have one and is good enough for what I use it for. https://www.amazon.com/gp/product/B00KXX2OYY?tag=dealnewscom&m=A3S1XFW75MYX5E https://www.amazon.com/gp/product/B00KXX2OYY?tag=dealnewscom&m=A3S1XFW75MYX5E