| Model | Head band loupe 2A |
| Magnification: | 3.5x |
| Working distance: | 380~420 mm (in one loupe) |
| Field of vision: | 100 mm |
| Depth of Field: | 90 mm |
| Magnification: | 2.5x |
| Working distance: | 380~420 mm (in one loupe) |
| Field of vision: | 110 mm |
| Depth of Field: | 85 mm |
| Battery | Build in type(upgraded design for wire connection) |
