| Models and technical parameters | TD3-1 | |
| Telescope | Imaging | Erect |
| Magnification | 30X | |
| Objective aperture | 45mm | |
| Field of view | 1°30" | |
| Shortest viewing distance | 1.4m | |
| Stadia ratio | 100 | |
| Resolution | 3" | |
| Angle mensurement | Minimum count | 1"5" |
| Mode of detection | H:double side V:double side | |
| Accuracy | 2"/5" | |
| Angular unit | DEG/MIL/GON | |
| Disply | LCD double side | |
| Compensation | Compensation range | ±3' |
| Precision of plate vial | 30"/2mm | |
| Precision of circular vial | 8'/2mm | |
| Power | Battery | lithium battery |
| Voltage | 3.7V | |
| Weight | 4.8kg | |
| Size | 200*160*345mm | |