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    • Home  / Product Manuals & Documentation
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    Speco VLT4DG / VLT4BG — 4MP TVI IR Series Instruction Manual

    September 08, 2026 2 min read

    Instruction manual for the Speco Technologies VLT4DG dome and VLT4BG bullet 4MP HD-TVI IR cameras.

    💾 Download Original PDF
    Full text manual (for reference)

    Instruction manual for the Speco Technologies VLT4DG (dome camera) and VLT4BG (bullet camera) — the 4MP HD-TVI IR series with D-WDR and on-board OSD control.

    Features

    • 4 Megapixel resolution
    • HD-Analog (TVI, AHD, CVI) multi-format output
    • D-WDR (Digital Wide Dynamic Range)
    • 2.8mm fixed lens
    • 6 high-power IR LEDs, 66 ft range
    • DC12V operation

    Package Contents

    Model Included Items
    VLT4DG (dome) Screws x3, Screws x4, Plastic anchors x4, Torx wrench x1, Junction box x1
    VLT4BG (bullet) Screws x3, Screws x4, Plastic anchors x4, L-wrench x1, Junction box x1

    Cable Connection

    1. Power Input: when using 12VDC (constant voltage, 500mA), connect to the center (+) pin using a DC12V power supply.
    2. Connect video cable: when using it as video output, connect the BNC cable to the BNC jack.

    Specifications

    Image Sensor 1/2.7" 4 Megapixel C-MOS Sensor
    Resolution 2,688 x 1,520 (4MP)
    Scanning System Progressive Scan
    Total Pixels 2,720 (H) x 1,536 (V)
    Video Output HD-Analog (TVI, AHD, CVI)
    TV System NTSC / PAL
    Min. Illumination Color 1 Lux, BW 0.5 Lux
    S/N Ratio 52dB (AGC off)
    Frame Rate 15fps
    Day & Night IR Cut Filter // Auto, Color, B/W, EXT
    Brightness 1 ~ 20
    AGC (Gain Control) 0 ~ 20
    WDR D-WDR / ON / OFF
    AWB ATW / MWB
    DNR 2D-DNR (1~16)
    Color Gain 1~16
    Mirror Default / H / V / HV
    Language Multi language
    IR Distance 6 high-power IR LEDs / 66 ft
    Remote Control Interface UTC
    Focal Length 2.8mm
    Max. Aperture Ratio F=2.0
    Focal Control / Lens Type Manual / Fixed
    Operation Temperature 14°F ~ 122°F
    Ingress Protection IP 66
    Input Voltage // Current 12V DC +10%
    Power Consumption Max. 5W
    Weight 0.7 lbs

    OSD Menu

    Press the SET button on the camera's OSD joystick to access the on-screen setup menu. Move the arrow to select functions using the UP/DOWN and LEFT/RIGHT buttons. Menu items include:

    • AE — Auto Exposure, Brightness, Exposure mode (Level / BLC / Global), Exposure level (1~20)
    • AWB — Auto White Balance mode (ATW / MWB), R-gain and B-gain adjustment (when in MWB)
    • DAY-NIGHT — Auto / Color / B&W / External mode selection
    • IMAGE ENHANCE — Contrast, Sharpness, Color Gain, DNR, Mirror (Default/H/V/HV), D-WDR on/off (all 1~16 range where applicable)
    • VIDEO OUTPUT — HD format selection (TVI, AHD, CVI, CVBS), video standard (4MP 30/4MP 25/4MP 15/1080p 25/1080p 30 for HD, or NTSC/PAL for CVBS); requires Reboot & Apply after changing
    • LANGUAGE — English / Chinese and other supported languages
    • RESET — restore factory defaults
    • SAVE-EXIT / EXIT — save changes and exit, or exit without saving

    Dimensions & Assembly

    VLT4DG (Dome): 4.72" x 4.72" x 3.38" housing. Component stack: 1) Base Housing, 2) Camera, 3) Dome cover, 4) Screws for fixing, 5) OSD joystick, 6) DC12V & video connections.

    VLT4BG (Bullet): 2.51" (Dia.) x 3.93" x 3.38" body, 7.79" (D) x 2.75" (H) overall with sun shield. Component stack: 1) Bolt, 2) Sun shield, 3) Body case, 4) Bracket, 5) OSD joystick, 6) DC12V & video connections.