I compared the measurements with Anritsu S362E and it's within 1 dBi, at least in the 2.4GHz band. The SWR curves are the same across the range and 1dBi, while not negligible, is enough for a pass/fail test on basic antenna tests, which is what I bought it for. This is accurate on Anritsu testing the Diamond 771, so lower frequencies may be more accurate. This seller didn't include calibration weights so I can't verify if it's calibrated or not. It comes with firmware version 0.83 and I can't find the firmware for it online.
SINGING WOOD Boombox Portable Bluetooth
9 Review
Experience Ultimate Music Enjoyment with Sony CD Boombox ZSPS50B.CED - USB Playback & Audio Input Included!
13 Review
Experience Nostalgic Music With KEiiD CD Player Retro Home Boombox: Get The Used-Like New Version For Just $99
17 Review
π§ Jaras JJ-Box89: Red/Black Sport Portable Stereo CD Player with AM/FM Radio & Headphone Jack Plug - Ultimate Music Companion on the Go!
10 Review