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

💻PC Programmable Cable Included

📡Quad Band 136-480 MHz

Description

📻 Own Every Band, Command Every Conversation

ALL INCLUSIVE PRO KIT - Comes with mic, mounting hardware, power cable, and user guide—everything you need to own the frequency.
PLUG PLAY PROGRAMMING - Included PC04FTDI cable makes custom channel setup effortless on Windows 10/XP—stay ahead with tailored comms.
COMPACT YET RUGGED DESIGN - Miniature 4.96x4.05x1.85 inch form factor packs serious power without weighing you down.
POWER THAT COMMANDS ATTENTION - Broadcast loud and clear with up to 25 watts output, ensuring your signal dominates the airwaves.
ULTIMATE FREQUENCY FLEXIBILITY - Seamlessly switch across VHF, 1.25M, and dual UHF bands for unmatched communication versatility.

The QYT KT-7900D is a compact, quad-band amateur radio transceiver delivering up to 25W output across VHF and UHF frequencies. Featuring 200 memory channels, a bright display, and a full accessory kit including a PC programming cable, it offers professional-grade communication in a mini form factor ideal for serious HAM operators seeking versatile, powerful, and customizable radio performance.

Specifications

ASIN	B01N5AV22U
Additional Features	Uhf
Best Sellers Rank	#1,730 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	4.2 4.2 out of 5 stars (84)
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
Tuner Type	UHF, VHF
UPC	711420946235
Unit Count	1.0 Count
Voltage	13.8 Volts
Water Resistance Level	Not Water Resistant
Waterproof Rating	IP67

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