What is the cable length?

The low voltage DC output cable is approx. 1.48 metres from mains unit to the end of the 2-pin socket. There is no input mains lead as the 13A plug forms part of the mains unit itself, which is of the nickname 'wall wart' type.

WHat is the length of the barrel

The length may be inconsistent, attach the size and length of all plugs: 5.5*2.5mm 12cm; 2.5mm 12mm; 3.5mm 14mm; 4.0*1.7mm 12mm; 3.5*1.35mm 12mm; 5.0*2.1mm 12mm; 5.5*2.1mm 12mm; 5.5*1.5mm 13mm

Is the output voltage regulated? ie. if variable power is drawn by devices (such as musical keyboards,) does this change the voltage?

It actually depends on if the currect your device draws is stable or not. From what you mentioned, there is two possibilities when the total power consumption is variable, one is the regulated voltage output with changeable current, another is un-regulated voltage with stable current. This power adapter belongs to the second situation, the voltage output may drop or up within 5% range, not actual 12V(11.9V or 12.2V) when you adjust the voltage knob at DC 12V setting. Hope this may help you.

30w Power Adapter | Desertcart Northern Mariana Islands

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Sold byAmazon Northern Mariana IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power up smarter, not harder — the only adapter your tech tribe needs!

SAVE SPACE MONEY - Replace multiple bulky adapters with one sleek, universal power solution—minimalist desk goals.
LOCK IN YOUR SETTINGS - Voltage dial secured with a key prevents accidental changes—no more unexpected shutdowns.
9 ADAPTER TIPS ZERO HASSLE - Clearly labeled, snug-fit tips eliminate guesswork and keep your devices powered safely.
POWER YOUR ENTIRE TECH ARSENAL - One adapter, 3V-12V voltage range, 2A output—perfect for routers, cameras, speakers & more.
FLIP THE POLARITY NOT YOUR DEVICES - Unique reversible polarity ensures compatibility with positive or negative core electronics.

The SoulBay 30W Reverse Polarity Universal Power Adapter delivers versatile 3V to 12V DC output at 2A with a unique reversible polarity feature and 9 interchangeable tips. Designed for a wide range of household electronics, it offers secure voltage settings with a key-lock dial and robust build quality, making it an all-in-one power solution that replaces multiple adapters while ensuring device safety and convenience.

Specifications

ASIN	B08QRWW89M
Amperage	2000 Microamps
Best Sellers Rank	4,911 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 124 in AC Adapters
Box Contents	Muti Jacks
Brand Name	SoulBay
Colour	Black
Compatible Devices	Speakers Routers CCTV Cameras LCD TV Box USB HUB IP Camera Led Lamps Router 3V-12V DC Household Electronics
Compatible Phone Models	Speakers Routers CCTV Cameras LCD TV Box USB HUB IP Camera Led Lamps Router 3V-12V DC Household Electronics
Compatible Power Plug Type	Type I - 3 pin (Australian)
Connectivity Technology	USB
Connector Type	5.5 x 2.1mm, 5.5 x 2.5mm
Country of Origin	China
Current Rating	2000 Milliamps
Current Type	AC to DC
Customer Package Type	12V DC Power Supply
Customer Reviews	4.4 4.4 out of 5 stars (264)
Enclosure Material	Plastic
Form Factor	Rectangular
Frequency Range	50 Hz - 60 Hz
Input Voltage	12 Volts
Item Weight	0.17 Kilograms
Main Power Connector Type	2 pin
Manufacturer	SoulBay
Model Name	12V Power Supply
Model Number	SoulBay 30W
Mounting Type	Tabletop Mount
Number of Items	1
Number of Power Levels	7
Output Current	2 Amps
Output Voltage	12 Volts (DC)
Portable	Yes
Power Plug Type	Type I - 3 pin (Australian)
Power Source	Corded Electric
Product Warranty	1 year warranty
Special Features	Charging Indicator, Lightweight Design, Short Circuit Protection
Specification Met	CE, FCC
Total USB 2.0 Ports	1
Total USB Ports	1
UPC	789219688642
Unit Count	1.0 count
Wattage	30 watts
Wired Charging Connector Type	USB Type A

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$66.27

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In stock

Sold byAmazon Northern Mariana IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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30W Power Adapter

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