| Model | FF-41 |
| Laser Diode(nm) | 635 |
| Centering Laser Diode(nm) | 650 |
| Vertical Accuracy | 5m + 1mm |
| Horizontal Accuracy | 5m + 1mm |
| Auto-Levelling Range | +3° |
| Horizontal Range | 120° |
| Vertical Range | 150° |
| Width of laser line | 2mm at distance of 5mm |
| Operating Temperature | -10°C ~ 45°C |
| Laser Class | 2 |