BenQ TK850i True 4K HDR-PRO Home Theater Projector – Refurbished


SKU: MAD4297 Category:


TK850 brings authentic HDR viewing into your brightly lit living room. Admire a huge 100”+ 4K UHD picture with HDR-PRO technology. Custom Sports audio and Image modes make all the action more immersive. The 8.3 million pixel image lets you watch from home but feel like you’re in the stadium. All this in a stylish, compact design that makes it the center of the action. Let TK850 transform your living room into the perfect venue for you and your friends!


Hyper-Realistic HDR-PRO
BenQ exclusive HDR-PRO technology enhances the 4K HDR viewing experience with greater contrast range and better detail. TK850 is supercharged with HDR10 & HLG(Hybrid Log-Gamma) support for unparalleled enjoyment.

See in the Dark
Some HDR projectors can lose details and display incorrect greyscales. BenQ Enhanced Cinema-Optimized Tone Mapping with Dynamic Iris and Dynamic Black technology* increases contrast ratio, preserving dark details in total clarity.

HDR Brightness
Keep ideal high contrast while projecting different image sizes and various screen gains most commonly used in home theater. This ensures greater contrast range and superior image quality when HDR mode is activated.

HDR brightness optimization provides the consistency performance from 80” to 180”

4K HDR Enjoyment
HDR-PRO technology is supercharged by HDR10 & HLG support

Premium 4K Lens Architecture
TK850’s 4K optical system uses the highest-grade glass for superior realistic image quality. The precision, 10-element, 8-group lens array allows greater light penetration for long-lasting 4K intensity.

Accurate Images
DMD DLP technology overcomes known alignment issues of LCD multiple panels. TK850 ensures image integrity and razor-sharp images devoid of artifacts such as blur, shadowing, and interference patterns.

Flawless Optics for Superb Image Quality
The BenQ 4K optical system uses only the highest grade glass for superior light penetration and realistic image quality. The proprietary low-dispersion lens coatings minimize chromatic aberration, so you can enjoy your favorite 4K UHD content in brilliant clarity. 

TK850’s dedicated Sports Mode enhances video quality with realistic skin tones

Sports Mode
Enjoy enhanced video quality with realistic skin tones, balanced outdoor blues and greens, and warm woodgrains for indoor sports action. Sports Mode also boosts the thrill of victory, accentuating the announcer’s commentary and the roar of the crowd.

Motion Enhancer
Eliminate laggy images, jittery playback, and blurry shadows. Interpolated frames are generated and displayed between individual frames. TK850 inserts 36 interpolated frames per minute for seamless, vivid 60-frames-per-second videos.

Indulge in Immersive Sound
TK850’s powerful 10-watt chambered speaker delivers enhanced sound quality for elevated enjoyment. TK850 is perfect for gaming, movie-watching, or streaming.

Deeper Resonant Bass
The resonance chamber enhances the wider frequency range for deeply resonant bass from a compact speaker.

Enjoy all authentic HDR scenes with vivid images anywhere even in your bright living room

Perfect Alignment
Keystone correction lets you project perfectly aligned images from many spots in a room. The vertical keystone function adjusts the image for a professionally squared image, countering the trapezoid effect when the projector must be placed off-center.

Zoom with Focus
TK850 maintains image integrity with zoom. By maintaining consistent zoom ratio, images retain visually perfect focus from corner to corner.

Universal Connectivity
Can transfer data at up to 5 Gbits, about 10 times faster than the USB 2.0 standard.

USB Media Reader
The USB reader lets users easily project video, audio, and picture content from removable disks without cables for high speed transmission.

BenQ TK850 Specs

Image Display

Display System 0.47″ DMD DLP
Native Chip Resolution 1920 x 1080 (Full HD)
On-Screen Resolution Up to 4K UHD (3840 x 2160) via Pixel-Shift Technology
Supported Resolutions Minimum: VGA – 640 x 480
Maximum: 4K UHD – 3840 x 2160
Max Brightness 3000 Lumens
Offset 100% 
Aspect Ratio Native: 16:9
Dynamic Contrast Ratio 30,000:1
Supported 3D Formats Frame Packing
Top Bottom
Side by Side
Color Wheel 4-Segment (RGBW)
Color Depth 10-Bit (1.07 Billion Colors)
Scan Horizontal: 15 to 135 kHz
Vertical: 23 to 120 Hz


Focus Manual
Lens f/1.9 – 2.47 (f = 12 – 15.6 mm)
Lens Shift Vertical: + 10%
Optical Zoom Manual: 1.3x
Throw Distance 2.461 – 32.031′ / 0.75 – 9.763 m
Throw Ratio 1.13 to 1.47:1 (100″ Screen Size @ / 2.5 m)
Projection Size 30 – 300″ / 76.20 – 762.00 cm


Keystone Correction Auto-Vertical: ± 30°
Supported HDR Input Formats HDR10, Hybrid Log Gamma
Ceiling Mountable Yes
Rear Screen Projection Yes
Built-In Speaker Yes (Stereo)
Speaker Power 10W

Input/Output Connectors

Inputs/Outputs 2 x HDMI (HDMI Type-A) Audio, Video Input
1 x USB 3.1 / USB 3.2 Gen 1 (USB Type-A) Audio, Data, Service, Video Input
1 x TOSLINK Audio Output
1 x 1/8″ / 3.5 mm Mini Audio Output
1 x USB 2.0 (Mini-USB) Service Input
1 x USB 2.0 (USB Type-A) Power Output
1 x RS-232 (DE-9/DB-9) Control
1 x 12 V Trigger Control Output


Light Source Lamp
Lamp Power 245 W
Expected Lamp Life Full Brightness: 4000 Hours
Medium Brightness: 10,000 Hours
Low Brightness: 15,000 Hours
Fan Noise Medium Brightness: 30 dB
Low Brightness: 28 dB
Security Cable Lock Slot
Security Bar
Supported Audio File Types FLAC, MP1, MP2
Supported Photo File Types

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