HYS-771N Dual-Band Whip (SMA-Female) vs Retevis RHD-771 (SMA-Female)

The Retevis RHD-771 is the clear winner here. These antennas are electrically identical, with both delivering roughly -1.0 dBi on VHF and 2.9 dBi on UHF due to their matching 391-395 mm lengths. The HYS-771N's claimed 2.5 dBi gain is overstated for its electrical length. What separates them is price: the Retevis costs $9.99 versus $18.99 for the HYS, yet scores higher at 88/100 to the HYS's 84/100. This advantage likely reflects build quality, reliability, or connector durability rather than RF performance, since the electrical characteristics are essentially the same.

Buy the Retevis RHD-771 if you want practical value and solid construction at a budget price. Buy the HYS-771N only if you need it immediately and the Retevis is unavailable, though you're paying a fifty percent premium for no performance gain.

For casual VHF use on a handheld, accept that both will underperform on the 2-meter band due to their electrically short length. On UHF at 435 MHz, both deliver acceptable performance as 5/8-wave antennas. The Retevis RHD-771 is the recommendation: better value, higher rated, same RF fundamentals.