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

⚡12V output power boost

🔋1A max current delivery

🛡️Built-in multi-protection IC

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Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔌 Boost your power game with smart, sleek USB-to-12V conversion!

POWER UP ANYWHERE - Seamlessly convert USB 5V to a robust 12V output—perfect for on-the-go professionals powering low-wattage devices.
SMART SAFETY FIRST - Advanced IC circuit guards against over-current, over-voltage, short circuit, and overheating—protect your gear with confidence.
COMPACT TRAVEL READY - Lightweight (39g) and sleek frosted shell design fits effortlessly in your tech kit or backpack.
PLUG PLAY SIMPLICITY - No drivers or setup needed—just connect and power your smart speakers, routers, cameras, and more instantly.
VERSATILE COMPATIBILITY - Supports a wide range of 12V low-power devices under 10W, from mini fans to development boards—future-proof your workspace.

The FARSENSE USB to DC 12V Step Up Power Cable is a compact, lightweight converter that transforms standard 5V USB power into a stable 12V output at 1A max current. Featuring a durable frosted shell and built-in intelligent IC protection, it ensures safe, reliable power delivery for low-wattage 12V devices like smart speakers, routers, and mini fans. Ideal for travel and everyday use, this plug-and-play cable offers versatile compatibility and peace of mind with over-current and short circuit safeguards.

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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