OptiVISOR® DA-4 Magnifying Glasses (2X Magnification at 10") Steel and even illness (i

and even illness (i

ABR-1 Thumbwheels - Coarse Knurl

At higher speeds

Audible & Visual Alarms – Alerts activate when readings exceed pre-set minimum or maximum limits

With a resin-over-resin bond on C-weight latex paper backing

OptiVISOR® DA-4 Magnifying Glasses (2X Magnification at 10") Steel and even illness (iThe Genuine Donegan OptiVISOR is a precision binocular headband magnifier that permits unrestricted user efficiency while reducing eye strain. It leaves both hands free and allows three dimensional vision. Used by anyone whose profession or craft requires close accurate work. Can be worn over prescription or safety eyeglasses. DA 4 gives 2 X magnification and focuses at 10". This is the original OptiVISOR proudly made by Donegan Optical Ltd right here