Binocular precision magnifier with adjustable headband and openable lens mounting. Consists of light, durable plastic and can be worn over spectacles. Polished lenses made of optical glass. Replacable lens mountings.Standard mounting is DA-4 (2.00x). 

Magnifications available:

DA-3: 1.75x

DA-4: 2.00x

DA-7: 2.75x.