BenQ TK705STi 4K UHD Short Throw Smart Gaming Projector
The BenQ TK705STi is a 4K UHD short throw projector built for big-screen gaming and home entertainment in tighter rooms. With 3000 ANSI lumens, a 0.8 throw ratio, 4LED light source, and an industry-leading 5ms input lag at 4K 60Hz, it casts a 100-inch image from just over 2 metres away while delivering blazing-fast response for console and PC gaming. Google TV is built in, so streaming, casting, and smart control all work out of the box.
Cinematic 4K UHD Visuals
True 4K UHD (3840 × 2160) resolution paired with 98% Rec.709 colour coverage and support for HDR10, HDR10+, and HLG means rich, accurate colour and lifelike contrast across films, sport, and games. The 4LED light source delivers up to 30,000 hours of viewing in ECO mode with no lamp replacements ever required.
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Resolution: 4K UHD (3840 × 2160)
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Brightness: 3000 ANSI lumens
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Contrast Ratio: 600,000:1 (FOFO)
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Display Color: 30-bit, 1.07 billion colours
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HDR: HDR10, HDR10+, HLG
Short Throw Convenience
With a 0.8 throw ratio, the TK705STi projects a 100-inch image from approximately 2.0 metres, making it ideal for apartments, smaller living rooms, and shared family spaces. 2D auto keystone (vertical ±30°, horizontal ±20°) gets the image square in seconds without manual fiddling.
Built for Gaming
Gamers get a true low-latency experience with 5ms input lag at 4K 60Hz, plus dedicated FPS, RPG, HDR FPS, and HDR RPG picture modes that boost shadow detail and visibility. Dual HDMI 2.1 ports support modern consoles and gaming PCs.
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Input Lag: 5ms (1080p 60Hz / 2K 60Hz / 4K 60Hz)
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Gaming Modes: FPS, RPG, HDR FPS, HDR RPG
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HDMI: 2x HDMI 2.1 (HDCP 2.2)
Smart Setup with Google TV
Built-in Google TV (Android 11) gives instant access to thousands of streaming apps, voice search, and personalised content recommendations. AirPlay and Google Cast are included for one-tap mirroring from iPhone, iPad, Android, and Chromebook. Wi-Fi 6 (802.11ax) and Bluetooth 5.2 keep wireless streaming smooth and stable.
Universal Connectivity
- 2x HDMI 2.1 (HDCP 2.2) with eARC on HDMI
- 1x USB-C (DisplayPort + 30W PD out + media reader)
- 1x USB-A 2.0 (media reader / firmware upgrade)
- 1x 3.5mm audio out
- 1x 12V DC trigger (3.5mm jack)
- Wi-Fi 6 (802.11 a/b/g/n/ac/ax, 2.4GHz/5GHz)
- Bluetooth 5.2
- HDMI eARC (7.1 channel passthrough)
- AirPlay and Google Cast
What's in the Box
- BenQ TK705STi projector
- Remote control RCI079 with batteries
- Power cord (1.0m)
- Quick start guide
- Warranty card
Full Specifications
Display
| Brightness |
3000 ANSI lumens |
| Native Resolution |
4K UHD (3840 × 2160) |
| Native Aspect Ratio |
16:9 |
| Contrast Ratio (FOFO) |
600,000:1 |
| Display Color |
30-bit (1.07 billion colors) |
| Light Source |
4LED |
| Light Source Life |
20,000 hrs (Normal) / 30,000 hrs (ECO) |
| Projection System |
DLP |
Optical
| Throw Ratio |
0.8 |
| Zoom Ratio |
Fixed |
| Lens |
F/#=1.8, f=8.498 |
| Projection Offset |
100% (full-height) |
| Keystone Adjustment |
2D Auto, Vertical ±30°, Horizontal ±20° |
Picture & Gaming
| Rec.709 Coverage |
98% |
| Picture Modes |
Auto Cinema, Energy Saving, HDR Auto Cinema, Bright, FPS, HDR, HDR FPS, HDR RPG, HDR10, HDR10+, HLG, RPG |
| Input Lag |
5ms (1080p 60Hz), 5ms (2K 60Hz to 1080p 60Hz), 5ms (4K 60Hz) |
| Resolution Support |
VGA (640 × 480) to 4K UHD (3840 × 2160) |
| Horizontal Frequency |
15K–102KHz |
| Vertical Scan Rate |
23–60Hz |
Smart System
| Built-in OS |
Google TV (Android 11) |
| Bluetooth |
Bluetooth 5.2 |
| Wi-Fi |
802.11 a/b/g/n/ac/ax (2.4GHz / 5GHz) |
| Wireless Projection |
AirPlay, Google Cast |
| Launcher |
Smart Home |
Audio
| Speakers |
2 × 8W |
| Audio Out |
3.5mm mini jack |
| HDMI Audio Return |
eARC, 7.1 channel |
I/O Interfaces
| HDMI In |
2 × HDMI 2.1 (HDCP 2.2) |
| USB Type-A |
1 × USB 2.0 (Reader / FW Upgrade) |
| USB Type-C |
1 × DisplayPort / PD out (5V-2A, 9V-2A, 12V-1.5A, 15V-2A / 30W) / Reader |
| DC 12V Trigger |
1 × 3.5mm jack |
| Audio Out |
1 × 3.5mm mini jack |
Power & Environment
| Power Supply |
AC 100–240V, 50/60Hz |
| Typical Power Consumption |
250W (110V) |
| Stand-by Power Consumption |
<0.5W |
| Network Stand-by Power |
<2W |
| Operating Temperature |
0–40°C |
| Acoustic Noise (Typ./Eco.) |
26dBA / 24dBA |
Physical
| Dimensions (W × H × D) |
229.2 × 168.2 × 249.7 mm |
| Net Weight |
3.8 kg |
What's in the Box
| Projector |
BenQ TK705STi |
| Remote Control |
RCI079 with battery |
| Power Cord |
1.0m (region-specific) |
| Quick Start Guide |
1 × |
| Warranty Card |
Yes (region-specific) |
| Universal Ceiling Mount |
CM00G3 (optional, sold separately) |
Specifications are sourced from the official manufacturer product page and may be updated.