it is a linear adjustable output.... or does it have specific switcj steps/adjustment points for output voltage....

On mine, there are no specific steps. There is a knob to turn to achieve whatever voltage you need down to 1/10 volt

Can this be used to charge a Bluetooth speaker?

That's one of the things that I do with mine, Jack. I use it to charge smaller electronics including a Fugoo XL Bluetooth speaker.

can you split the DC side to two wires, one positive and one negative?

Hmmm... I'm not sure I understand the question. The output is a 5.5mm x 2.1mm barrel connector with the center terminal positive and the outer sleeve negative. I don't know how how you'd have DC or AC current without two wires from the source.

will this power a Jackery 1000W at 30V - is there a compatible connector?

Absolutely not. The maximum voltage output is 24v, maximum current is 36w.

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Universal 3V - 24V 1.5A 36W Adjustable DC Power Supply Adapter Speed Control Volt Display with Variable 8 Plugs and 1 Polarity Reverse Cable Cord

Product ID: 125960352

Details

Amperage
1.5 A
Brand
AlloverPower
Color
Black
Compatible Devices
Cameras
Connector Type
Barrel Mini
Included Components
Power supply 8

⚡3-24V adjustable voltage

📊LED digital voltage display

🔌8 versatile plug tips + polarity reverse

€ 37.18

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Description

🔋 Power your projects with precision and versatility — never settle for less!

BUILT IN POWER SWITCH - Convenient ON/OFF toggle for quick control without unplugging.
CLEAR DIGITAL READOUT - LED display shows real-time voltage for confident adjustments.
UNIVERSAL COMPATIBILITY - Includes 8 plug tips and polarity reverse cable to fit 90% of DC devices.
SILENT EFFICIENT POWER - 36W max output with quiet operation—no distracting fan noise.
PRECISION VOLTAGE CONTROL - Dial in exact volts from 3V to 24V for tailored power delivery.

The Universal 3V-24V 1.5A 36W Adjustable DC Power Supply Adapter offers seamless voltage customization with an easy-to-read LED display, 8 interchangeable plugs, and a polarity reverse cable. Designed for broad compatibility with most DC devices, it delivers quiet, efficient power with a built-in switch for ultimate convenience.

Specifications

ASIN	B07QVXYBDC
Amperage	1.5 A
Brand	AlloverPower
Built-In Media	Power supply adapter, 8 different plugs, and 1 polarity reverse cable
Color	Black
Compatible Devices	Cameras, Monitors, Printers, Speakers, Tablets
Compatible Phone Models	iPhone ( Lightning to USB adapter required), Samsung Galaxy, Google Pixel, Huawei, Xiaomi, and other USB or Mini USB compatible phone models
Compatible Power Plug Type	Type A - 2 pin (North American)
Connectivity Technology	USB
Connector Type	Barrel Connector, Mini USB, Wireless
Current	AC/DC
Current Rating	1.5 A
Customer Package Type	Packaging
Customer Reviews	4.4 4.4 out of 5 stars (735)
Enclosure Material	Plastic
Form Factor	Rectangular Adapter
Frequency Range	50 - 60Hz
Input Voltage	120 volts
Item Weight	0.3 kg
Main Power Connector Type	2 Pin
Manufacturer	Allover Power Supply
Mfr Part Number	36W3-24
Model Number	RS2816
Mounting Type	Wall Mount
Number of Items	1
Number of Power Levels	22
Output Current	1.5 A
Output Voltage	24 volts
Plug Type	A- US style
Power Plug	Type A - 2 pin (North American)
Power Source	Corded Electric
Special Features	Long power cord, good compatibility, safety
Total USB 2.0 Ports	1
Total Usb Ports	1
UPC	713929750115
Unit Count	1 Count
Wattage	36 watts
Wired Charging Connector Type	USB 2.0 Micro A, USB Mini A, USB Type A

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€ 37.18

Duties & taxes included

In stock

Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Spain.

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Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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