How do I switch it to Amateur frequencies?

This is a GMRS only radio. It will not change to the amateur frequencies. There are other radios from QYT as well as B-tech that will allow access to amateur bands as well as GMRS frequencies. However this radios at not FCC approved for use on FRS and GMRS frequencies

speaker output- is the audio output a normal jack or something special? a 1/4" jack?

Believe or is a normal audio out Jack

Which Antenna does it use?

A Dual Band Antenna Patriot or Cushcraft. Some of the GMRS channels have been blocked in this model.

what would i buy to plug this in to an AC adapter at home instead of vehicle?

Will need to buy a power converter. 12 volt DC to 110/120 volt aC

Kt 8900 | Desertcart Brazil

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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R$1436

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Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📻 Power Your Connection, Command Your Range!

COMPACT YET RUGGED DESIGN - Lightweight and easy to mount, perfect for off-roaders, RVers, and professionals on the move.
VERSATILE GMRS COMPATIBILITY - Seamlessly connect with all FRS and GMRS radios across 15 channels plus 8 repeater channels.
REAL TIME NOAA WEATHER ALERTS - Get instant severe weather warnings to keep your adventures safe and stress-free.
UNMATCHED 25 WATT DUAL BAND POWER - Stay connected up to 12 miles with robust VHF/UHF output for crystal-clear communication anywhere.
PRIVACY CODES FOR DISTRACTION FREE CHANNELS - Block unwanted chatter with advanced CTCSS/DCS codes and own your communication space.

The QYT KT-8900 is a professional-grade 25W dual-band GMRS mobile radio offering up to 12 miles of reliable communication. Featuring 15 GMRS channels, NOAA weather scan and alert, and advanced privacy codes, it’s designed for off-roaders, farmers, and mobile professionals who demand clear, secure, and weather-aware connectivity. Compact and lightweight, it requires an external antenna and supports Windows versions below Win11 for software compatibility.

Specifications

ASIN	B09G962T3J
Additional Features	Lightweight / Dual Band / Noise Reduction / CARRIER / CTCSS / DCS / 5Tone / 2Tone / DTMF /ANI
Best Sellers Rank	#365 in Portable FRS Two-Way Radios
Brand	QYT
Built-In Media	1x 2.8 ft DC Cable with Cigarette Plug Connector, 1x Microphone with DTMF Keypad, 1x Mobile Transceiver, 1x Mounting Bracket(Fuse and Screws included), Cable
Color	Black
Compatible Devices	Devices with VHF and UHF frequency range and compatible output power
Connectivity Protocol	DTMF
Customer Reviews	4.2 4.2 out of 5 stars (108)
Frequency Range	462.55 - 462.725MHz, 462.5625 - 462.7125MHz, 467.55 - 467.725MHz
Impedance	50 Ohms
Item Dimensions D x W x H	4.65"D x 3.86"W x 1.38"H
Item Type Name	Two Way Radios
Item Weight	0.9 Pounds
Manufacturer	QYT
Mfr Part Number	KT-8900-BLACK
Model Number	KT-8900-BLACK
Number of Channels	200
Talking Range Maximum	12 Mile
Temperature Range	-5℉ to 140℉ Degrees Fahrenheit
Tuner Type	UHF
UPC	717977012829
Unit Count	1.0 Count
Voltage	13.8 Volts (DC)
Warranty Description	3 months warranty
Water Resistance Level	Not Water Resistant

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