If you mean electrical noise, there's some fast switching noise on the output as you might expect from a switching power supply, the amplitude stays the same but the frequency goes up with output voltage. It'll show up on a 'scope if there's no load, probably as a sequence of quick impulses with a decaying "ring", it's nowhere near as bad as a typical cheap switched PSU and any kind of load capacitance should mop it up. If you mean audible noise, it has a fan but that only comes on when it's hot. Without the fan running it's effectively silent, though some switching PSUs can emit a whistle at the switching frequency, if you get one with something physically able to vibrate inside and your ears are up to hearing that. My ears aren't bad and I've heard nothing from my one.

With ‎wps1203h style ‎120v/3a(360w) what is maximum current at 12v / 24v?

At both voltages, the max current is 10 amps.

How do I set constant current for it? It keeps reverting to 0 when i press output

Replicated your problem on my unit - once you have set your required voltage output and the maximum current limit setting for the item under test or being run you then push 'Output' .... BUT, if there is no active load attached to the power supply it will show the row of 'zero's' on the current readout after a couple of seconds or so.

When using the usb output is the current and voltage displayed so that you can use it as a usb power meter?

NO THERE IS NO VISUAL INDICATION THAT THE USB CIRCUIT IS ON OTHER THAN THE APPLIANCE ON CHARGE THE FRONT PANEL SHOWS ONLY POWER OUTPUT NOT USB.

Wps3010h | Desertcart KUWAIT

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Description

⚡ Power Precision Meets Portability — Own the Bench, Own the Future!

COMPACT POWERHOUSE - Lightweight (2.47 lbs) and sleek design fits seamlessly on any modern workspace.
EFFORTLESS OPERATION - Encoder knob and output toggle switch make adjustments intuitive and quick—perfect for busy pros.
SMART USB FAST CHARGING - Integrated 18W USB port auto-adapts to your device’s fast charging protocol—no extra chargers needed.
SAFETY FIRST ENGINEERING - Built-in OVP, OCP, SCP, and temperature controls protect both your projects and the power supply.
PINPOINT PRECISION CONTROL - Ultra-fine 0.01V & 0.001A resolution for exact voltage and current tuning.

The NANKADF WPS3010H is a compact, high-precision DC power supply delivering up to 30V and 10A with 4-digit LED accuracy. Featuring an intuitive encoder knob, built-in safety protections, and a versatile 18W USB fast charging port, it’s designed for electronics professionals and enthusiasts who demand reliable, space-saving power solutions with smart functionality.

Specifications

ASIN	B09C8LWV9W
Amperage	10 Amps
Best Sellers Rank	715 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 2 in Industrial Power Supply
Brand Name	NANKADF
Colour	Black
Connector Types	Usb
Country of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (1,124)
Enclosure Material	PE_(Polyethylene), PLA_(Polylactic_Acid), PS_(Polystyrene)
Form Factor	compact
Input Voltage	115 Volts (AC)
Item Dimensions	19 x 9 x 15 centimetres
Item Weight	1.51 Kilograms
Manufacturer	NANKADF
Manufacturer Part Number	WPS-10H
Maximum Power	300 Watts
Model Number	WPS3010H
Output Current	10 Amps
Output Voltage	30 Volts (DC)
Output Wattage	300 Watts
Specification Met	CE, RoHS
UPC	780279579734

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