Does antenna need to be grounded?

The antenna does not need to be grounded, You can also add an additional ground plane kit to it, ground plane kit will enhance the signal strength and efficiency

Is the SWR of the antenna to be less than 1.5?

Antenna tested by a comprehensive measuring instrument, the SWR of the center frequency conforms to the technical parameters (less than 1.5), Your test need to eliminate interfering factors such as test frequency, antenna installation, feeder line

Can it be used indoors?

Yes, it can be used both indoors and outdoors. It works for indoor use in places like attics and garages

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UHF Fiberglass Mobile Radio Antenna, 400-470mhz GMRS Base Antenna, 17 inches SO239 Connector for Ham Radio Device Repeater Mobile Transceiver with Mount Bracket

UHF Fiberglass Mobile Radio Antenna, 400-470mhz GMRS Base Antenna, 17 inches SO239 Connector for Ham Radio Device Repeater Mobile Transceiver with Mount Bracket

Product ID: 299379007

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Details

Antenna
Radio
Brand
UAYESOK
Color
white
Number of Channels
2
Impedance
50 Ohm
Maximum Range
70 Centimeters

⚡2.5 dBi gain for stable signal

📡400-470 MHz frequency range

🛠️SO239 connector & easy mount bracket

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Description

📡 Stay connected, stay ahead—your signal’s new best friend!

POWERFUL SIGNAL BOOST - 2.5 dBi gain ensures you hit repeaters with confidence every time
EFFORTLESS INSTALLATION - Versatile indoor/outdoor mounting with included hardware—no ground plane needed
RUGGED FIBERGLASS BUILD - Lightweight, UV-resistant, and corrosion-proof for all-weather durability
COMPLETE READY TO GO KIT - Includes antenna and mount bracket—get on air fast without extra gear
SEAMLESS FREQUENCY COVERAGE - Optimized 400-470 MHz range for crystal-clear TX/RX communication

This 17-inch UHF fiberglass mobile antenna operates within 400-470 MHz, delivering 2.5 dBi gain and supporting up to 100W power. Designed for ham radios and repeaters, it features a durable, weatherproof fiberglass build and a SO239 connector. Easy to install indoors or outdoors with included mounting hardware, it ensures reliable, stable communication for emergency, outdoor, and professional use.

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