RadioRanked verdict
HYS
HYS 21-inch NMO Kit with L-Bracket
The value here is the bundle, not just the whip. If you are starting from zero, this is a sensible one-box way to get a working mobile antenna on the vehicle.
Proprietary RR score
How we scored it
Performance is derived from the antenna's length in wavelengths on each band it covers, not from the advertised gain. How we score →
Length versus wavelength
What 533 mm Buys You
An antenna radiates according to its length measured in wavelengths, not according to the number on the packaging. Here is where this one lands on each band it covers.
| Band | Wavelength | This antenna | Works out as |
|---|---|---|---|
| VHF146 MHz | 2053 mm | 0.26 λ | quarter wave |
| UHF435 MHz | 689 mm | 0.77 λ | full wave |
Decision helper
Is this antenna right for you?
Yes, if you're…
- ✓First-time NMO installs that need the mount and cable too
- ✓Hood, trunk lip, or fender mounting
Skip it, if you're…
- ✕Permanent roof installs (a drilled NMO hole is more secure)
- ✕Anyone who already owns a mount and cable
Tradeoffs
The good and the bad
What we like
- Bundles antenna, L-bracket mount, and 13.1 ft of coax in one order
- Modest, well-supported gain claim, especially on 70cm
- 100W handling
- L-bracket suits a hood, trunk lip, or fender install without drilling a roof hole
What we don't
- L-bracket mounts are more exposed to knocks than a roof-drilled NMO
- 2m performance is basic, just past a quarter wave
- 21 inches needs clearance awareness in tight parking
Ready to buy?
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Overview
The HYS NMO kit bundles a 21-inch (533 mm) dual-band whip with a stainless L-bracket mount, 13.1 feet of coax terminated in PL-259, and mounting hardware, so it is one purchase rather than three separate ones. It is rated for 100 watts with a claimed VSWR under 1.5.
At just past a quarter wave on 2m and 0.77 wavelengths on 70cm, into full-wave territory, the length favors 70cm noticeably more than 2m, though both are usable. HYS claims a modest 2.15 dBi, which our model comfortably supports on both bands; if anything the claim undersells the 70cm side. For a hood, trunk lip, or fender mount where you have nothing else yet, the bundled hardware is worth more than the antenna itself.
Specifications
| Frequency bands | VHF, UHF |
| Gain | 2.15 dBi |
| Connector | NMO |
| Length | 533 mm |
| Antenna type | mobile |
| Flexible | No |
| color | With Bracket and NMO Cable Mount |
| unitCount | 1 |
Key Features
- Complete Communication Set: Includes a 21-inch dual-band whip antenna, a stainless steel L-bracket mount, 13.1ft of coaxial cable, and mounting hardware for immediate installation on your vehicle.
- High-Performance Frequencies: Supports both VHF and UHF bands with a 2.15dBi gain and a maximum input power of 100W, ensuring strong, omni-directional signal transmission. VSWR is rated at less than 1.5.
- Sturdy L-Bracket Mount: The specialized bracket is designed for secure, stable placement on a hood, trunk lip, or fender, holding the NMO base firmly in place even at high driving speeds.
- Premium Coax Connection: Comes with 13.1 feet of heavy-duty cable, providing plenty of routing length from the exterior to your interior mobile dashboard. Terminated with a standard PL-259 plug.
- Wide Compatibility: Ideal for two-way amateur radios and scanners. Features vertical polarization and direct ground lightning protection to offer reliable, safe operation in various outdoor environments.