The MOTOROLA VX-451 is a durable portable two-way radio, providing on-the-job responsiveness, the VX-451 maximizes worker uptime with expanded safety applications and convenient built-in features designed for heavy duty use.

Monitor Worker Safety

As with all MOTOROLA radios, the VX-451 includes built-in Emergency and Lone Worker alerts. Emergency notification is user-initiated with a press of a button for the radio to switch to a designated channel and send an alert for help. Lone Worker mode is a built-in timer that requires the user to reset at a predetermined interval. If not reset, the radio automatically switches to Emergency mode to alert help.

When constant contact is required at all times, Vertex Standard's exclusive Auto-Range Transpond System (ARTS) is included to inform the user that other ARTS - equipped radios are within communication range.

No two job sites are alike and the optional Man Down function (with DVS-9 unit) is programmable to monitor a variety of worker timed safety scenarios vertically and horizontally as well as worker degree of motion. Adjusting the settings of the 3-axis sensor adapts the radio to each distinct work environment to monitor movement.

Solid Build for Extreme Environments

The VX-451 withstands job site abuse meeting military standards for ruggedness and meets the IP57 ingress protection standard where water does not harm the radio when submersed* to a depth of 3 feet for up to 30 minutes.
*IP57 water submersion rating valid only with accessory cover attached.

Audio and Voice Responsiveness

Features 700 mW loud audio output ideal for noisy work environments.

Includes Channel Announcement which loudly speaks the channel description to simplify changing channels when focused on other tasks simultaneously.

Features voice activation (VOX) when used with MH-81A4B headset that enables users to transmit voice without pressing the Push-To-Talk (PTT) button for hands-free operation.

Record and store up to 120 seconds of voice messages using the optional DVS-8 Voice Storage unit.

Built-in Selective Signaling Modes

Includes MDC-1200 encode/decode along with both 2-tone and 5-tone encode/decode providing selective radio calling and efficiency in supporting a variety of discreet communications needs.

Large Group Communications Made Easy to Manage

The VX-451 has a 32 channel capacity and 2 groups to easily manage a variety of calls at the most complex job site or plant operation.

FCC Narrowbanding Compliant

Meets the FCC Part 90 requirement for using 12.5 kHz channels by January 1, 2013.


  • 32 Channels / 2 Groups
  • 5 Watts
  • 3 Programmable keys
  • IP Rating: 57
  • 700 mW Audio output
  • Whisper mode
  • Compander
  • Clear voice
  • Voice inversion encryption (on/off activation)
  • Minimum volume control
  • RX/TX Battery power save
  • Auto-Range Transpond System II (ARTS II)
  • Manual squelch adjustment
  • Channel announce
  • Voice activation (VOX)
  • Radio to radio cloning
  • PC Programming


  • CTCSS/DCS Encode/Decode
  • Dual 2-Tone Decode
  • 2-Tone Encode/Decode
  • 5-Tone Encode/Decode
  • Remote Stun/Kill/Revive (5-tone)
  • Emergency
  • Lone Worker
  • DTMF Speed Dial
  • DTMF Paging
  • MDC-1200 Encode/Decode


  • Scan
  • Priority
  • Dual Watch
  • Follow Me
  • Talk Around
  • Scan Set
  • 32 Scan List
Type/Style Analog
Listed Under The Following Manufacturer Part Numbers VX-451
Manufacturer MOTOROLA

Related Products