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Alert System Type
Motion Alert
IP / Network / Ethernet
AC / DC Powered
B&W Cameras
Color Cameras
Ethernet Compatible
Infrared/Night illumination
Motion Activated
Motion Activated Recording
Remote Controlled
Remote Pan / Tilt
Status Indicators
Wall Mounted
# of Channels
4 Channels
# of Ports
2 Ports
# of LED's
24 LED's
Included # of Cameras
4 Cameras Included
1 TB (Terabyte)
Maximum Resolution
520 Lines
100 to 240V AC, 50/60Hz
Ease of Installation
Intermediate (Installs < 60 minutes)
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Long-Range Communicating Wireless Security Cameras with Large 1TB Hard Drive
DEFENDER Sentinel Pro 4CH 1TB DVR with 4 Wireless Cameras, 520TVL
DEFENDER Sentinel Pro 4CH 1TB DVR with 4 Wireless Cameras, 520TVL
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System Features Wireless Camera and Features Camera Side View
Front-Facing View of Camera Camera Setup Freestanding DVR
DVR Features DVR Rear View Wireless Receiver for Cameras
Wireless Communication What's Included
DEFENDER 21305 Sentinel Pro 4CH 1TB DVR with 4 Wireless Cameras, 520TVL
Item# 28505
Price: Normally $799.99 
Hot Deal $725.89
Free shipping on orders over $175 - See Details


  • 4 wireless 520TVL cameras
  • 24 IR LEDs provide night vision up to 100ft
  • Wireless communicating range up to 750ft (optimal up to 200ft)
  • Remote viewing through smart device or computer
  • Large storage 1TB hard drive in DVR

Essential Info

The 21305 Sentinel Pro from DEFENDER is a professional quality security monitoring system for a home or office that can be installed by a DIY'er. It features a four channel DVR (digital video recorder) with a built-in 1TB HDD (hard disk drive) and four wireless 520TVL (TV lines) cameras. Each wireless camera pairs to a DEFENDER wireless receiver and each receiver will pair with up to two cameras with a communicating range up to 750 feet. Upon setup of the system you will have access to a variety of viewing options giving you full access to see your property whether you're home or away. Through DEFENDER's remote viewing software you can network the DVR to the internet so that you'll be able to view live camera feeds, watch recorded footage and receive motion activated email alerts from a smart device or computer anywhere in the world, provided an internet connection is available. Additionally, the DVR can be connected directly to a monitor or TV for viewing with the ability to custom name channels, view picture-in-picture, full screen, quad screen, zoom or set sequence switching. Setting up and navigating the system is quick with the included USB mouse or via remote control.


What's Included

  • 1x - 1TB Pro DVR
  • 4x - Wireless Camera
  • 2x - Receiver
  • 7x - Power Adapter
  • 4x - Video Cable w/ BNC Adapter
  • 1x - Remote Control + Batteries
  • 1x - USB Mouse
  • 1x - Ethernet Cable
  • 4x - Window Warning Sticker
  • Mounting Hardware
  • 1x - Instruction Manual
  • 1x - Remote View Software CD
  • 1x - Quick-Start Guide
  • More Info

    The four wireless PHOENIX cameras included with this system are 520TV Line resolution cameras that will provide a clear picture of whatever is being monitored. Each camera is weather-resistant and IP65 rated to protect the camera from the elements year-round if being installed outdoors. Built-in to the cameras are 24 IR (infra-red) LEDs, per camera, which allow each to see up to 100 feet away in complete darkness. The infra-red LEDs do not emit a visible light either so while they're monitoring your property at night they will also stay completely hidden and out of sight. Vandal-resistant mounting hardware is also included with each camera which allows for a secure mount on just about any indoor or outdoor installation.

    Actual Footage from DEFENDER Camera

    Included with this system are two PHOENIX wireless receivers that connect with up to two wireless PHOENIX cameras a piece. The PHOENIX receiver has a transmission range up to 450 feet and an optimum transmission range up 150 feet allowing for a large radius in which connected cameras can be setup and still communicate with their respective receiver. LED status indicator lights on the front of the unit will let you know if the receiver has power and the receiver will also provide out of range alerts if it is no longer receiving a signal from a connected camera.

    The brain of this system is the DVR which records footage of all the connected wireless cameras and allows for live viewing of each camera feed. This high-powered DVR has a large 1TB hard drive which gives it the ability to store up to four years-worth of video footage that can be easily played back if ever needed. Setup of the DVR is quick. It connects to a monitor or TV with a VGA or HDMI cable and then lets you customize the system to your needs via a remote control or included USB mouse. The system provides options such as setting up email alerts upon motion detection, event searching and area masking (blurring out of faces or objects such as the combination lock to a safe). Once connected to a monitor or TV, a handful of viewing options will also be at your disposal such as picture-in-picture, full screen of a selected camera, quad screen, eight channel view, zoom and sequence switching. Included 1 Step remote viewing software will also allow for viewing of live camera feeds, watching saved footage and receiving of email alerts from a computer or smart device with an internet connection.


    Manufacturer Product No.21305
    Wireless Camera (each)
    Dimensions6.18in x 5.75in
    Weight0.9 lbs
    Image SensorCMOS
    Resolution640x480 / 520TV Lines
    Night VisionYes
    IR LEDs24
    Night Vision DistanceUp to 100ft
    Optimal Focal Distance35ft
    Transmission RangeUp to 750ft
    Optimal Transmission Rangeup to 200ft
    Temperature SensorNo
    IP RatingIP65
    KeysPair button
    Housing MaterialAnodized aluminum
    Wall MountableYes
    Operating Temperature14° ~ 122°F
    -10°C ~ 50°C
    Operating HumidityLess than 90% RH
    Power100-240V AC
    Wireless Receiver (each)
    Dimensions4.8in x 1.1in
    Weight0.3 lbs
    LCD DisplayNo
    Frame Rate25fps
    Video Out2 x Composite Video
    Audio OutNo
    Frequency2.4 GHz
    TechnologyDigital FHSS
    # of Hop/Sec1,000
    # of Hopping Channels32
    Channel Bandwith2 MHz
    Data Rate4 Mbps
    Transmission Power+19 dBm
    Transmission RangeUp to 450ft
    Optimum Transmission RangeUp to 150ft
    Out of Range AlertYes
    Real Time ClockNo
    LEDsPower Link x2
    Keys2x pair button
    Housing MaterialABS Plastic
    Operating Temperature32° ~ 122°F
    -10°C ~ 50°C
    Operating HumidityLess than 90% RH
    Power100-240V AC
    Dimensions8.75in x 11in x 2in
    Weight3.75 lbs
    Video CompressionH.264
    Audio CompressionG.711
    # of Channels4
    Video Input4 BNC
    Video Output2 BNC
    1 VGA
    Audio Input2 RCA
    Audio Output1RCA
    USB Port2
    Resolution800x600, 1024x768, 1280x1024
    NTSC: 60fps@D1, 120fps@HD1, 120fps@CIF
    Recording ModesMotion Record, Schedule, Always
    Pre-RecordingMax 10 seconds
    Post RecordingMax 5 minutes
    Recording MediaHDD (back-up via USB)
    Storage Capacity1TB
    HDD TypeSATA 3.5in
    Video FormatNTSC/PAL
    Video Loss AlarmAuto detect alarm
    Audio Bitrate8kbps
    Live Frame Rate30fps
    Live ViewingFull, Quad, PIP, Zoom, Seq
    Network ProtocolTCP/IP, DDNS, DHCP, PPPoE, UDP
    Network LAN IPStatic, Dynamic
    Network Connection10/100 BaseT Ethernet (RJ-45)
    Supported Operated SystemsWindows XP, Windows Vista, Windows 7, OSX 10.5 or above
    BrowsersInternet Explorer, Safari
    Play Search ModeTime/Date, Event List
    Play Speed2x, 4x, 8x, 16x
    Pan/Tilt/ZoomRS-485 Pelco D&P
    Time and Date Stamp DisplayYes
    Password ProtectionYes
    Disk Full WarningYes
    Automatic Overwrite OptionYes
    LED IndicatorsPower, HDD
    Housing MaterialAluminum
    Housing ColorBlack
    Operating Temperature32°~104°F
    Operating Humidity10%~90%
    Power100~240V AC
    Power Consumption10~15W


    System Features  Wireless Camera and Features  Camera Side View  Front-Facing View of Camera 
    System Features  Wireless Camera and Features  Camera Side View  Front-Facing View of Camera 
    Camera Setup Freestanding  DVR  DVR Features  DVR Rear View 
    Camera Setup Freestanding  DVR  DVR Features  DVR Rear View 
    Wireless Receiver for Cameras  Wireless Communication  What's Included   
    Wireless Receiver for Cameras  Wireless Communication  What's Included   


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