What is current requirement in transmit mode?

Rated 25 w on high power and 5 w on low. Actual output is slightly lower. It is an amateur radio but can transmit out of band. Be careful. It also has 350 to 390 mhz tx and rx. This is not a legal use band in US. I receive good reports using this rig.

I see it comes with a 6 ft dc cable with cigarette plug connector, can it be plugged in inside a house? (110v)

No, you will need a 13.8 Volts - 20Amp power supply, in my case I have a car battery inside in my house with a 3 Amp battery tender, when you have a power outage, your mobile still able to ear and transmit.

Is there a gain control for the micphone?

No there isnt. Im sure you can add gain control with some testing and the will,

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QYT KT-7900D 25W Mini Quad Band Base 136-174mhz (VHF), 220-270mhz (1.25M), 350-390 mhz (UHF), 400-480mhz (UHF) Quad Standby Amateur (HAM) Free Programming Cable

QYT KT-7900D 25W Mini Quad Band Base 136-174mhz (VHF), 220-270mhz (1.25M), 350-390 mhz (UHF), 400-480mhz (UHF) Quad Standby Amateur (HAM) Free Programming Cable

Product ID: 70790870

Details

Brand
QYT
Color
Black
Compatible Devices
Other QYT the
Frequency Range
136 - 174 MHz
Item Weight
0.45 Kilograms
Number of Channels
200

⚡25W VHF / 20W UHF Power

📡Quad Band 136-480 MHz

🖥️Free PC Programming Cable

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Description

📻 Own the Airwaves with Power & Precision!

COMPACT LIGHTWEIGHT - Mini 4.96x4.05x1.85 inch design weighing just 2.3 lbs—perfect for mobile setups without bulk.
POWERFUL TRANSMISSION - Broadcast loud and clear with up to 25 watts output, dominating local repeaters and channels.
PLUG PLAY PROGRAMMING - Includes PC04FTDI cable for effortless programming on Windows 10/XP—get on air faster than ever.
PRO LEVEL FUNCTIONALITY - Advanced features like PTT ID, DTMF, remote stun/kill, repeater support, and customizable power settings.
ULTIMATE QUAD BAND COVERAGE - Seamlessly switch across VHF, 1.25M, and dual UHF bands for unmatched communication flexibility.

The QYT KT-7900D is a compact, quad-band amateur radio transceiver delivering up to 25W output across VHF and UHF frequencies. Designed for serious HAM operators, it features 200 memory channels, advanced communication functions, and comes complete with a free programming cable for easy customization. Lightweight and versatile, it’s the perfect mobile rig for professionals who demand reliable, high-performance radio communication.

Specifications

ASIN	B01N5AV22U
Additional Features	Uhf
Best Sellers Rank	#772 in Portable FRS Two-Way Radios
Brand	QYT
Built-In Media	KT-7900D, microphone (DTMF function), 2.8 ft DC cable with cigarette plug connector, radio & mic brackets, mounting hardware, programming cable and user manual
Color	Black
Compatible Devices	Other QYT two-way radios using the same proprietary protocol, compatible microphone, and accessories
Connectivity Protocol	Proprietary protocol
Customer Reviews	4.1 out of 5 stars 81 Reviews
Frequency Range	136 - 174 MHz, 350 - 390 Mhz, 400 - 480 MHz
Item Weight	0.45 Kilograms
Manufacturer	QYT
Mfr Part Number	2831251
Model Number	ABCD
Number of Channels	200
Special Feature	Uhf
Tuner Type	UHF, VHF
UPC	711420946235
Unit Count	1.0 Count
Voltage	13.8 Volts
Water Resistance Level	Not Water Resistant
Waterproof Rating	IP67

Reviews

J**.

17.03.2026

B**Z

30.04.2026

K**S

26.02.2024

R**O

24.02.2025

A**G

2.09.2025

D**N

14.04.2025

T**N

13.10.2022

A**R

19.05.2025

H**R

8.07.2023

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5324871₫

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In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vietnam.

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