Specification:

Angle of Visual Field:45° ±5°
Rang of Pupil Distance:52mm~74mm Weight:230g(not include Head Bracket) Adjustment Rang of Fillet: 　　　
Head Girth 530mm~630mm 　　　
Depth 85mm~125mm
IIIumination:6V/10W Halogen Lamp Input Voltage:220V/50HZ

Specifications:

IIIumination Form:Big Spot,Small Spot,Slit,Net,Red Free
Diameter of Filter:0.2mm-0.4mm
IIIumination Brightness: ≥801X
Dioptor Compensation:-35D-+20D,24 in total
IIIumination Source :3.5V/2.8W,Haiogen Bulb
Power:AC220V/50Hz or 2# Alkalescent Battery/2# Rechargeable Battery

Specifications:

Working Distance :1m
Adjustable Range of Streak:0.2mm-0.4mm
Streak Rotation:360^O
IIIumination Source:3V/2.1W,Incandescent Bulb
Power: AC220V/50Hz