Which end of cable is 5 volts input and which is 12 volts output?

5 volts is the USB-A input side. The output is on the barrel plug and is 12V.

I have a 5v/3a power bank that I'm planning to use to power up a 12v 1.5a monitor. Will this work?

The max output current for 12V is 1 amp. Your monitor requires 1.5 amps so technically the draw over the rating of the adapter and will not work.

Could this be used for audio equipment as a 12v trigger to activate (an amplifier) from another device that has USB but no trigger output?

Probably will work. I used a 5v usb connector in my car to feed this device. It gave me a 12 v output to supply a radar detector.

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FARSENSE USB to DC 12V Step Up Power Cable (3ft), DC Jack 5.5 x 2.5mm (3.5 x 1.35mm) USB Boost Converter with LED Indicator

FARSENSE USB to DC 12V Step Up Power Cable (3ft), DC Jack 5.5 x 2.5mm (3.5 x 1.35mm) USB Boost Converter with LED Indicator

Product ID: 450125344

Details

Amperage
1 Amps
Brand
FARSENSE
Colour
ice
Compatible devices
12V DC barrel
Compatible phone models
less than 10W
Connector type
USB Type A

⚡Boosts 5V USB to 12V DC

💡LED power indicator

🔋Delivers up to 1A current

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Description

⚡ Power Up Anywhere, Stay Connected Everywhere!

SMART SAFETY SHIELD - Built-in intelligent IC protects your devices from over-current, over-voltage, and short circuits.
COMPACT TRAVEL READY - Lightweight (39g) and sleek frosted shell design fits easily in any tech bag or pocket.
EFFORTLESS POWER BOOST - Seamlessly converts standard 5V USB to a reliable 12V output, perfect for your on-the-go tech needs.
INSTANT VISUAL FEEDBACK - Integrated LED indicator keeps you informed of power status at a glance.
UNIVERSAL COMPATIBILITY - Plug & play with 12V low-power devices like smart speakers, cameras, routers, and more.

The FARSENSE USB to DC 12V Step Up Power Cable is a compact, lightweight boost converter that transforms a 5V USB input into a stable 12V output at up to 1A. Designed with a frosted shell and built-in intelligent circuitry, it ensures device protection against electrical faults. Ideal for powering low-wattage 12V devices such as smart cameras, routers, and portable gadgets, it features a handy LED indicator and plug-and-play convenience, making it a must-have for tech-savvy professionals on the move.

Specifications

ASIN	B09NSHWLV9
Additional Features	Lightweight Design
Amperage	1 Amps
Best Sellers Rank	#104,612 in Computers ( See Top 100 in Computers ) #6,923 in USB Cables
Brand	FARSENSE
Built-In Media	1 x USB Cable
Color	ice
Compatible Devices	12V DC barrel interface equipment below 10W
Compatible Phone Models	less than 10W power equipment
Connectivity Technology	USB
Connector Type	USB Type A
Current	DC
Current Rating	1 Amps
Customer Package Type	FFP
Customer Reviews	4.2 4.2 out of 5 stars (299)
Enclosure Material	Plastic
Input Voltage	12 Volts
Item Weight	0.03 Kilograms
Manufacturer	FARSENSE
Mfr Part Number	UC12
Model Name	UC12
Model Number	UC12
Number of Items	2
Output Current	1 Amps
Output Voltage	12 Volts
Portable	Yes
Power Plug	No Plug
Power Source	Corded Electric
Total Usb Ports	1
UPC	797444852486
Unit Count	1 Count
Wattage	10 watts
Wired Charging Connector Type	USB Type A

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