i need longer length: can several be sequenced together?

Yes, but only up to a point. I'd estimate two or three would be good, but over that could be problematic.

Will this cable work with Amcrest brand cameras?

Power only? Yes if your connections are!… “ Connectors - Female: 2.1mm x 5.5mm jack. Male: 2.1mm x 5.5mm barrel plug.”

Can this power extension cable be used outdoors?

Sorry, We haven't experimented. we are make sure it could use it indoor.

Does this extension cable work with the Amazon Echo 15?

I really don’t know as they were used for an outside camera

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Uogw 2 Pack DC Power Extension Cable 20ft 2.1mm x 5.5mm Compatible with 12V DC Adapter Cord for CCTV IP Camera, LED, Car, White

Product ID: 442581197

Details

Brand
Uogw
Colour
White
Connector gender
Plug type
2.1mm x 5.5mm
Voltage
12 Volts

📏20ft ultra-long reach

🔌2.1mm x 5.5mm precision connectors

🛠️flat cable for no-drill installation

Description

🔋 Power up your security with effortless reach and flawless fit!

SLEEK FLAT CABLE DESIGN - Easily thread through tight spaces—no drilling or damage needed.
COMPLETE INSTALLATION KIT - Includes 24 wire clips for a clean, professional setup that impresses.
RELIABLE COPPER CORE WIRING - Ensures stable power delivery and minimal signal loss for uninterrupted surveillance.
EXTEND YOUR SECURITY PERIMETER - 20ft length lets your cameras cover more ground without compromise.
UNIVERSAL 2 1 MM X 5 5 MM COMPATIBILITY - Seamlessly powers most 12V DC devices with industry-standard connectors.

The Uogw 2 Pack DC Power Extension Cable offers two 20ft white cables with 2.1mm x 5.5mm connectors, designed to extend power for 12V DC devices like CCTV and IP cameras. Featuring a flat cable for easy installation without drilling, copper wiring for reliable conductivity, and 24 wire clips for tidy setup, it’s the perfect upgrade for professionals demanding extended, hassle-free security coverage.

Specifications

ASIN	B07QXKHHV8
Best Sellers Rank	219,293 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 3,864 in Extension Cords
Brand Name	Uogw
Colour	White
Connector Gender	Male-to-Female
Customer Reviews	4.6 4.6 out of 5 stars (1,380)
Indoor Outdoor Usage	Indoor, Outdoor
Input Current	2 Amps
Item Length	240 Inches
Item Weight	0.31 Kilograms
Manufacturer	Uogw
Manufacturer Part Number	EDC422
Model Number	EDC422
Number Of Conductors	2
Number of Items	2
Number of Outlets	1
Plug Type	2.1mm x 5.5mm
Special Features	Lightweight
UL Listed	No
UPC	682141269517
Unit Count	40.0 meter
Voltage	12 Volts
Wattage	24 watts

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