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BenQ TH685i Projector

    BenQ TH685i Projector

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    TH685P | 1080p HDR 3500lm Home Theater Projector

    BenQ Home Cinema Projector

    TH685i | 1080p HDR 3500lm Projector with Android TV


    BenQ projector Full HD Cinema Enjoyment in Bright Room

    Full HD Cinema Enjoyment for Bright Rooms

    Treat your eyes to the brilliance of Full HD 1080p visuals, with amazing detail clarity and sharpness for exceptional home cinematic experiences in well-lit environments.

    Realistic Projector-Optimized HDR with 4K Support

    BenQ exclusive projector-optimized HDR with HDR10 and HLG support offers greater brightness, contrast range, and image optimization, downscaling 4K HDR Blu-rays and streaming content for brilliant cinema enjoyment in bright settings.

    Supercharged by HDR10 and HLG support with BenQ exclusive projector-optimized HDR

    Tailor-Made for Gaming

    Overpowered Gaming Visuals

    Low Input Lag Performance

    Ultra-fast 8ms* low input lag conveys your sights, hearings, and thoughts into actions with zero delay. (*Input lag is 8ms: 1080p@120Hz, 16ms:1080p@60Hz, 33ms: 4K@60Hz downscaling to 1080p)


    BenQ projector with low input lag performance

    Black Detail Enhancement

    Detect and react one step quicker to approaching dangers by easily mapping out details in the dark with BenQ-exclusive Black Detail Enhancement, which accentuates fine details in dark scenes without sacrificing color performance in brighter areas.


    BenQ Black Detail Enhancement which discloses fine details in dark scenes

    Indulge in Immersive Sound

    The 5W chambered speaker upgraded with a wider frequency range for deep bass and soaring highs, BenQ audio-enhancing technology also provides exclusive EQ algorithms for pure clarity and sensual sound quality.


    The 5W chambered speaker of BenQ projector

    Endless Entertainment

    Lose yourself in your favorite content with direct access to streaming apps. Use Android TV to watch all your beloved streaming apps like Prime Video, Hulu, YouTube, and more. *Note: Netflix only supports specific authorized devices and is not natively available on BenQ smart home projectors. Please follow these recommended viewing procedures.


    BenQ projectors are powered by Android TV
    • One Google Account for Seamless Streaming Fun

    • 5,000+ of the Latest Apps from Google Play

    • Get inspired all hands-free

    Flexible Installation

    Digital Lens Shift

    Digital lens shift provides perfectly straight-edged images, allowing more flexible installation and placement options.


    Digital Lens Shift

    Auto Vertical Keystone

    Auto vertical keystone self-adjusts for squared images, letting you easily project aligned images from various angles.


    Auto Vertical Keystone

    Projection Distance

    1.3x zoom maximizes available space with a range of throw distances for big-screen entertainment without the hassle of complicated installation.


    Projection Distance

    Universal Connectivity

    • game console icon


    • Game Console

    • handheld console icon

      Handheld Game Console

    • Laptop icon


    • Blu-ray player icon

      Blu-ray Player

    BenQ TH685i's IO port

    All Specifications

    Brightness (ANSI lumens)
    • 3500
    Native Resolution
    • 1080P (1920x1080)
    Native Aspect Ratio
    • 16:9
    Contrast Ratio (FOFO)
    • 10,000:1
    Display Color
    • 30-bit (1.07 billion colors)
    Light Source
    • Lamp
    Light Source Life
    • a. Normal 4000 hrs, b. ECO 10000 hrs, c. SmartEco 8000 hrs, d. LampSave 15000 hrs
    Throw Ratio
    • 1.127~1.46
    Zoom Ratio
    • 1.3x
    • F/#=1.94~2.07;f=11.9~15.5 mm
    Projection Offset (Full-Height)
    • 105%
    Keystone Adjustment
    • 1D, (Auto) Vertical ± 40 degrees
    Rec. 709 Coverage
    • 95%
    Picture Modes
    • 3D, Bright, Cinema, Game, HDR, HLG, Living Room, Sports, User 1, User 2
    Input Lag
    • 16.7 ms (1080p@60Hz), 33.4 ms (4K@60Hz) *downscaling to 1080p, 8.3 ms (1080p@120Hz)
    Resolution Support
    • VGA (640 x 480) to 4K UHD (3840 x 2160)
    Horizontal Frequency
    • 15K~102KHz
    Vertical Scan Rate
    • 23~120KHz
    I/O Interface
    PC in (D-sub 15pin)
    • (x1), PC in-1 (shared with component video)
    HDMI in
    • (x2), HDMI-1 (2.0b/HDCP2.2), HDMI-Internal (2.0b/HDCP2.2)
    USB Type A
    • (x1), USB Type A-1 (2.0/Power Supply1.5A)
    RS232 in (DB-9pin)
    • (x1)
    • (x1), 5W Chamber
    Audio in (3.5mm Mini Jack)
    • (x1)
    Audio out (3.5mm Mini Jack)
    • (x1)
    HDMI Audio Return
    • Yes, ARC, 5.1 channel
    Operating Temperature
    • 0~40℃
    Power Supply
    • AC 100 to 240 V, 50/60 Hz
    Typical Power Consumption (110V)
    • 297W/110V
    Stand-by Power Consumption
    • <0.5W
    Acoustic Noise (Typ./Eco.)(dB)
    • 35/29 dB
    Android TV dongle
    • (Standard), QS01
    Remote Control w/ Battery
    • RCI067
    Power Cord (by region)
    • x1 (1.8M)
    3D Glasses
    • (Optional), DGD5
    Quick Start Guide
    • (x1) 21L
    Warranty Card (by region)
    • Yes
    Universal Ceiling Mount
    • (Optional), CM00G3
    Dimension & Weight
    Dimension & Weight
    • 312 x 110 x 225
    Net Weight (kg)
    • 2.79
    Dimensions (WxHXD) (inch)
    • 12.28 x 4.3 x 8.85
    Net Weight (lb)
    • 6.15
    Projection System
    Projection System
    • DLP