The Standard Horizon HX400 is a fully submersible commercial grade marine VHF handheld radio with a built-in voice scrambler and Land Mobile Radio (LMR) band capabilities.
The HX400 package includes the radio, AC charger, DC charger cable, drop-in charge cradle, FNB-115LI battery pack housing an 2400 mAH lithium-ion battery, belt clip, removable antenna, hand strap, and owner’s manual.

Standard Horizon HX400
The drop-in charger cradle will hold the radio or the battery alone and fully charge a depleted battery pack in 3 hours using either the AC adapter or DC power cord. The charger displays a red light to indicate charging and green for a fully charged battery.
Buy this Standard Horizon handheld VHF radio here.
Other Standard Horizon HX400 features include a noise canceling microphone, programmable channel names, low battery indicator, and the ability to use 40 programmable LMR channels.
The HX400 is constructed on a die-cast metal chassis protected by a polycarbonate outer shell. With the battery pack in place the unit measures 2.3-inches wide, 5.2-inches tall, and 1.6-inches deep. Overall height with the antenna in place is 11.2-inches. Sans belt clip the HX400 weighs in at 11.9 ounces.
Radio Controls
Standard Horizon HX400 functionality is controlled using eight front panel pushbuttons and a rotary volume/on/off knob located on top of the case. You will also find an optional microphone/headset jack on top between the antenna and volume control. The push-to-talk switch is side-mounted.
One button control is available for transmitter power selection of 1- or 5-watts, up or down channel changing, weather channel selection, a preset channel change, quick selection of channel 16 or 9, and some scanning options. Switching between channel groups is accomplished by holding the 16/9 and pressing the CLR key to change group.
Squelch is set by pressing the SQL key and then adjusting as desired using the up/down arrows. Numbers displayed onscreen tell you where the squelch is set, it can be set to one of ten levels. Pressing and holding the SQL key lets you go to zero squelch which might allow you to hear a weak incoming voice signal. When you release the button the radio returns to the previous squelch setting.
This Standard Horizon handheld will allow the user to select up to 10 channel presets. You can arrange them in order as desired, and then select them for use with the PRESET key and the up/down arrows.
A built-in voice scrambler will let you have a private conversation on an open VHF channel with another party as long as they are also equipped with a voice scrambler. This radio is compatible with other Standard Horizon handheld and fixed mount VHF radio voice scramblers.
A set menu gives the user control of beep sound level, various screen backlight control including the brightness, several scan settings, weather alert, custom channel n





