Our take
The IN3916 is the classroom choice here when writing or pointing directly on a projected image matters. Its short-throw lens helps at a nearer position, but it is not an ultra-short-throw model.
Interactive classroom or collaboration use when the specific wand and working computer path are verified.
It is not for 4K detail, a guaranteed current software workflow, a battery setup, or a room that requires a true ultra-short-throw projector.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- InFocus specifies WXGA and a 0.52:1 throw ratio for the IN3916 model column.
- The LiteBoard Wand system supports annotation and pointer input on the projected image.
- HDMI, USB display, wired LAN, and 20 W stereo speakers cover varied classroom sources.
What to weigh up
- The fixed-focus lens gives little placement flexibility beyond its short-throw distance.
- The documented computer and wand software dates from older operating-system generations.
- A used unit may be missing the wand, dock, charger, or remote listed in the original kit.
The key details
| Model covered | IN3916 |
|---|---|
| Image format | Native WXGA 1280 × 800 DLP |
| Rated light output | 2,700 lumens; source does not specify ANSI |
| Placement | 0.52:1 short throw; fixed-focus lens |
Performance figures are manufacturer claims. Source checked October 10, 2026. Regional models and included accessories can differ.
What the features mean for you
Interactive projection changes the classroom role
InFocus describes the IN3916 as an interactive projector in the IN3900 series. Its LiteBoard Wand acts as a wireless pointer and allows a presenter to draw, annotate, click, and move through slides on the projected image. This can replace the workflow of walking to a separate board for every markup, but the model is not a touchscreen and does not make every surface equally usable. The original specification lists the wand kit as a standard accessory. For a used purchase, verify that the wand, dock, charger, and any needed receiver are actually included and still communicate with the projector.
Short throw is useful, but it is not UST
The IN3916 specification gives a 0.52:1 throw ratio and a fixed-focus lens. That is short throw: it can form a wide classroom image from nearer than a conventional ceiling projector. It is not the ultra-short-throw category used for a projector placed close to a wall or board. Check the exact image width and distance from the lens before selecting a mount, because moving the unit changes the projected size. The fixed lens has no optical zoom range to absorb a substantially different room dimension. If the projector must sit almost against the wall, compare a documented UST interactive model.
WXGA suits slides better than tiny text
InFocus lists native WXGA at 1280 × 800 in its IN3916 column. The 16:10 panel fits many laptop presentation layouts, and its 2,700-lumen rating supports the classroom role described in the data sheet. The source calls the figure lumens without stating ANSI, so it is not converted to ANSI for the matching filter. Fine text, small spreadsheets, and detailed video still benefit from higher native resolution. The projector can accept several video modes, but input compatibility is not a substitute for the panel's native pixel grid. Match the expected audience distance and slide design to WXGA before choosing it.
Older connections still offer useful choices
The IN3916 has HDMI 1.3, two VGA inputs, USB display, a LAN port, RS-232, and separate audio connections. InFocus also describes a 20-watt stereo system. Those ports can support a classroom PC, a control system, or an external video source, while wired LAN enables the documented network functions. The data sheet's compatibility section names older Windows, Mac, and Linux environments for some display tools. That does not prove a current laptop will work without adapters or software changes. Test the actual connection and interaction workflow with the intended computer before relying on it in class.
Check age, lamp, and interaction accessories
This is a lamp-based model from an older product generation. InFocus lists 2,500 hours in Bright mode and 4,000 in Eco mode, but those figures describe rated life rather than remaining service on a particular unit. Ask for the lamp counter, inspect the image for color uniformity and focus, and confirm ventilation and filter condition. The manufacturer sheet lists a wand kit and software in the standard configuration, while the same document describes separate optional accessories. A present-day used bundle may be incomplete. This is a mains-powered projector, so its short-throw body is not portable in the battery sense.
What else to compare
For a board-hugging interactive setup compare Epson BrightLink 475Wi or BenQ MW820ST; for a standard presentation without pen input compare the Epson PowerLite 826W.
Before you buy
Is the IN3916 ultra-short-throw?
No. Its documented 0.52:1 ratio is short throw, but it is not an ultra-short-throw wall-hugging design.
Does it support interactive writing?
InFocus documents its LiteBoard Wand system for pointing, clicking, and annotating on the projected image.
Will the wand be in a used listing?
The original data sheet lists a standard wand kit; ask the seller to confirm the wand, dock, charger, and condition.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- InFocus-authored IN3900 series data sheet ↗ — checked October 10, 2026.
- InFocus-authored IN3900 series data sheet ↗ — checked October 10, 2026.
The decision
Choose the IN3916 for its documented interactive wand and short classroom throw only after verifying the exact accessories and computer compatibility.
Is it the right fit?
Check the exact model and today’s offers on Amazon.