They work, not sure about the -10dB rating, I think less. I originally wired them up for a cellular booster and when my mofi device arrived I used two of these in my wifi router setup. I notice that they work less during night frosts.
Gadgets World FBA_ALFA ARSN19M OMNI Directional High Gain
9 Review
Asus RP-N12 N300 WLAN Repeater π 802.11 B/G/N - Boost Your Wireless Range!
10 Review
4G LTE modem MikroTik LHG LTE6 kit white
38 Review
π‘ MikroTik LHG 5: High-Gain Dual Polarization Grid Antenna, Enhanced 5 GHz Performance (US Version)
9 Review
π uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
11 Review
π Juiced Systems Silver BizHUB USB-C Multiport Gigabit HDMI Hub with 3 USB 3.0 Ports, Gigabit Ethernet, 4K HDMI, SD/Micro SD, and USB-C Power Delivery
11 Review
π StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review
π StarTech.com NETRS232 Serial to IP Ethernet Device Server - DIN Rail Mountable - Serial Device Server - Serial Over IP Device Server (Black)
4 Review