Nose and throat scope parameter
| Model | GEV-H340 | GEV-H3401 | GEV-H350 |
| Size | 680mm*2.9mm*1.2mm | 480mm*2.9mm*1.2mm | 480mm*3.8mm*2.2mm |
| Pixel | HD320,000 | HD320,000 | HD320,000 |
| Field angle | 110° | 110° | 110° |
| Depth of field | 2-50mm | 2-50mm | 2-50mm |
| Apex | 3.2mm | 3.2mm | 4mm |
| Insert tube outer diameter | 2.9mm | 2.9mm | 3.8mm |
| Inside diameter of working passage | 1.2mm | 1.2mm | 2.2mm |
| Angle of bend | Tumn upz275°Turn down275° | ||
| Effective working length | 680mm | 480mm | 480mm |