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SHNITPWR AC Adapter 120W Universal Power Adapter 4V 5V 6V 9V 12V 15V 18V 19V 20V 24V Adjustable Switching Power Supply 100V~240V AC to DC 4V ~ 24V 5A Converter with 14 Tips & Polarity Converter
SHNITPWR

SHNITPWR AC Adapter 120W Universal Power Adapter 4V 5V 6V 9V 12V 15V 18V 19V 20V 24V Adjustable Switching Power Supply 100V~240V AC to DC 4V ~ 24V 5A Converter with 14 Tips & Polarity Converter

Bottom line: The SHNITPWR AC Adapter 120W Universal Power Adapter 4V 5V 6V 9V 12V 15V: LCD shows live output voltage before you connect a device; main trade-off: analog knob means fine voltage setting takes a careful hand.

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ LCD shows live output voltage before you connect a device
  • ✓ DC 4V-24V adjustable covers 4.5V, 9V, 12V, 19.5V, 24V and points between
  • ✓ Max 5A / 120W handles LED strips, DC pumps and small motors
  • ✓ 15 tips included: 2.5x0.7mm up to 6.5x4.4mm+Pin, plus Micro-B and Type-C
  • ✓ Screw-terminal DC connector lets you wire bare leads for DIY builds

Cons

  • ✗ Analog knob means fine voltage setting takes a careful hand
  • ✗ Only reaches roughly 13V-14V at 50% knob travel, so top end is compressed
  • ✗ Indoor use only per SHNITPWR, so no outdoor or damp-location installs
  • ✗ 6ft cable is fixed length with no listed extension option

Manufacturer description

The SHNITPWR 120W universal AC adapter replaces the drawer full of mismatched wall warts behind your bench. One unit covers DC 4V to 24V, adjustable by knob, at up to 5A and 120W total, with an LCD readout that shows the live output voltage before you ever plug it into a device. That display matters: it is the difference between confirming 9V and guessing at it. The upgraded revision spreads the knob travel more evenly, reaching roughly 13V to 14V at the halfway point, and adds an off position so you can kill power without yanking the plug from the wall. Fifteen tips ship in the box…

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SpecPicks Verdict

SpecPicks scored SHNITPWR AC Adapter 120W Universal Power Adapter 4V 5V 6V 9V 12V 15V… using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. SHNITPWR's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

What voltages can this adapter actually output?

Anything from DC 4V to 24V, set by knob. SHNITPWR lists 4V, 4.5V, 5V, 5.5V, 6V, 9V, 12V, 14V, 15V, 16V, 18V, 19V, 19.5V, 20V, 22V and 24V among the usable points, with the LCD confirming the setting.

How much current can it deliver?

Up to 5A, capped at 120W total. Draws below that ceiling are fine, including 300mA, 500mA, 1A, 2A, 3A, 4A and 5A loads.

Which tips are included?

The original 5.5x2.5mm plus 14 more: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-B, Type-C and a screw-on DC terminal connector.

Can it power a center-negative device?

Yes. The upgraded version ships with a polarity converter cable specifically to handle center-negative gear that the standard tips cannot.

Is it safe to leave running unattended?

It has automatic over-voltage, over-current, over-temperature and short-circuit cutoffs built in, and SHNITPWR rates it for indoor use only. Set the voltage against the LCD before connecting, and check the listing for current warranty terms.

Key Features

  • 【Input and Output】Input: AC 100~240V, 50/60Hz ; Output: DC 4~24V Adjustable, Max 5A 120W ; It can supply with voltage between 4~24V,such as 4V 4.5V 5V 5.5V 6V 9V 12V 14V 15V 16V 18V 19V 19.5V 20V 22V 24V, etc and amp less than 5A, such as such as 300mA, 500mA,1A, 1.5A, 2A, 2.5A, 3A, 3.5A, 4A, 4.5A, 5A. LCD display will show the output voltage, in case that wrong voltage regulation damage your device.
  • 【Upgraded Version Power Supply】We have made the following improvements: 1. The knob can be adjusted more evenly, and it can reach 13V ~ 14V by rotating 50%. 2. Increase the off gear to turn off the power without pulling the plug. 3.Add a polarity converter cable, which make it compatible with more devices，doubles its range of application.
  • 【14pcs Frequently Used Tips】It comes with an original 5.5x2.5mm tip and 14pcs frequently used tips: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-B, Type-C and DC terminal connector. Can be applied to almost all commonly used electronic devices. You can screw wires onto it easily, perfect for DIY projects.
  • 【Widely Used】The 120W all-in-one multipurpose AC/DC adapter fit for many 4~24V small household electronics such as LED strips, under-cabinet light, TV Box, smart speaks, wireless routers, essential oil diffuser humidifier, camera, hard disk box, DC motor, DC pump, DVR NVR surveillance system etc.For indoor use only.
  • 【Safety Protection Systems】Built-in multiple safety protection systems. Automatic over voltage cut-off, over current cut-off, over temperature cut-off, short circuit cut-off. We focus on producing premium quality and safety power adapters. No noise, no spontaneous combustion, no explosion, no fire hazard, safe to use. 6ft long power cable makes it convenient to use.

Full Specifications

BrandSHNITPWR
ColorBlack
CurrentDC
Wattage120 watts
Amperage5 A
Plug Type5.5x2.5mm 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C and DC terminal connector
Power PlugType A - 2 pin (North American)
Unit Count1 Count
ConnectivityWireless
Model NumberSNT-0324-120
Power Sourceac
Input Voltage240 volts
Mounting TypeWall Mount
Built-In MediaCable
Connector Typebarrel connector
Output Current5 A
Output Voltage24 volts
Connection TypeWireless
Frequency Range50Hz to 60Hz
Mfr Part NumberSNT-0324-120

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SHNITPWR AC Adapter 120W Universal Power Adapter 4V 5V 6V 9V 12V 15V 18V 19V 20V 24V Adjustable Switching Power Supply 100V~240V AC to DC 4V ~ 24V 5A Converter with 14 Tips & Polarity Converter is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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SHNITPWR AC Adapter 120W Universal Power Adapter 4V 5V 6V 9V 12V 15V 18V 19V 20V 24V Adjustable Switching Power Supply 100V~240V AC to DC 4V ~ 24V 5A Converter with 14 Tips & Polarity Converter
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