The description says "switching" and "transformer" - is this a switching power supply or a regulated power supply? my application is a am radio.

This is definitely a switching PS. I would be surprised if your AM radio could tell.

Will this work for samsung qled monitor model c27fg73q ?

I have no idea. What does the documentation,or label, say it needs in the way of voltage and current?

Could this be used outdoors in an area that doesn’t get wet but may have humidity? Can I wrap with something to keep moisture out from humidity?

I don't think that humidity would be a problem so long as the humidity doesn't convert to water droplets on the device. The manufacturer does specify indoor use only and to avoid water. That being said this device only costs around $10 so if it fails you're not out that much. The only concern being one of safety regarding water droplet formation from excessive humidity. This is plugged into a 110-120 VAC source so electrical shock is a possible hazard.

Will this work to push my Norditrac stationary bike. 6v will barely turn the lights on?

I don't know anything about your particular bike, but I seriously doubt it. 24 watts isn't much power. What does your manual say about the power requirements? You have to meet both the voltage and current (amperage) specifications. If your bike is only rated for 6 volts and you put 12 volts on it, you could blow up the electronics. If you don't have the manual, you should be able to find the info online.

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🔋 Power up smarter, not harder.

LONG REACH NO LIMITS - 6ft cable length gives you the freedom to power your devices wherever you need them, hassle-free.
PLUG PLAY VERSATILITY - Universal 5.5x2.1mm barrel jack compatible with 2.5mm plugs, perfect for a wide range of 12V electronics.
POWER THAT ADAPTS TO YOU - Intelligent output auto-adjusts from 50mA to 2A, delivering exactly what your device needs—no more, no less.
ENERGY SMART WALLET FRIENDLY - Level VI efficiency saves 10-20% energy compared to older adapters, reducing your carbon footprint and power bills.
GLOBAL READY SAFETY CERTIFIED - Over 20 certifications including UL, FCC, CE, TÜV, and more—trusted worldwide for safety and reliability.

The Chanzon 12V 2A 24W power supply features a universal 100-240V input and a versatile 5.5x2.1mm barrel plug compatible with 2.5mm connectors. It intelligently adjusts output current from 50mA to 2A to match device needs, ensuring efficient power delivery. Certified by over 20 global safety standards, this Level VI energy-efficient adapter saves up to 20% energy and comes with a 6ft cable for flexible use across a wide range of 12V electronics including CCTV, routers, and LED lighting.