The BenQ LW820ST is designed with Dust Guard technology including sealed laser modules to protect the laser bank. This lock-and-key design hermetically seals the laser engine from dust to prolong the projector lifespan. With a fully enclosed laser light source and an innovative sealed engine design powered by BenQ Dust Guard technology, BlueCore education projectors guarantee 20,000 hours of maintenance-free operation.
| Brand | BenQ |
| Power Supply | 100 ~ 240V AC |
| Throw Ratio | 0.52 |
| Projection Size | 60"~120" |
| Keystone Correction | 1D keystone, Vertical +/- 30 degrees |
| Projection Offset | 106.1 +/- 2.5% |
| Lens Control | Manual Focus |
| Zoom Ratio | Fixed |
| Security | Kensington Lock |
| Product Weight | 5.6 kg |