Safety First Engineering
Every power adapter comes with integrated protection: overload cut-off, thermal shutdown, short-circuit defense, and over-voltage protection.
Smart Compatibility
Universal fit with popular connector types like 5.5×2.1mm, 5.5×2.5mm, and 3.5×1.35mm. Perfect for a wide range of electronics, from surveillance cameras to LED strips.
Ready for Any Environment
Waterproof and weather-resistant models available. Built to perform both indoors and outdoors—even in challenging conditions.
COOLM Best Sellers: Power You Can Count On
Trusted by thousands of DIYers, technicians, and installers. These popular COOLM products combine functionality, protection, and plug-and-play ease—designed to keep your devices running smoothly and safely.
DC Power Cord 5.5mm x 2.1mm Female to 5.5mm x 2.5mm Male
A simple but essential solution for converting power plug sizes. This 6.3-inch adapter ensures smooth connection between 5.5 x 2.1mm female and 5.5 x 2.5mm male jacks. Comes in a pack of two, and replacement options are available in case the wrong size was ordered. Compact, durable, and ready to bridge the compatibility gap.
12V 2.5A Power Adapter – COOLM AC 100-240V to DC 12V 2500mA
Delivering 30W of stable output with a 5.5mm x 2.5mm interface (also compatible with 5.5 x 2.1mm), this power adapter is a perfect replacement for lower amperage units. Certified by CE and FCC, it includes built-in protections against overload, thermal surges, and short circuits. Ideal for CCTV systems, DVRs, and LED lighting setups. Not compatible with Silent Partner Tennis Machines.
12V 4A Power Supply – COOLM AC 100-240V to DC 12V 4A 48W
Heavy-duty power at its best. With a 48W output and a 5.5mm x 2.5mm plug (also compatible with 2.1mm), this adapter includes a free female connector for faster LED or camera setup. Smart chip technology guards your device with short circuit, overload, and over-voltage protection. A premium choice for more demanding applications.
About COOLM
COOLM is a reliable manufacturer of power accessories, specializing in solutions for devices operating on direct current (DC). The company’s product range includes power supplies, extension cables, waterproof adapters, and various connection wires — ideal for surveillance systems, LED lighting, routers, and other electronics.
COOLM offers a wide selection of DC power adapters with different outputs, ranging from compact 12V 2.5A units to more powerful 12V 5A models with splitters for multiple device connections. These solutions are perfect for powering both standalone devices and entire systems that require multiple components to be connected simultaneously.
The brand places special emphasis on power and extension cables, offering models in various lengths and with popular connectors such as 5.5×2.1mm, 5.5×2.5mm, and 3.5×1.35mm. Waterproof options and splitter cables are also available, allowing flexible power setups even in more demanding environments.
COOLM products are known for their ease of use, durability, and affordable pricing. Thanks to their high quality and broad compatibility, the brand’s solutions are successfully used in both home and professional applications.
Hear From Customers
I’ve used a lot of brands in the field, but COOLM stands out for one reason—zero guesswork. The adapters are always clearly labeled, cables are robust, and the protection features are a lifesaver for sensitive CCTV gear. Clients appreciate reliability, and I appreciate not having to return faulty equipment. Also, the 12V 4A model with extra connectors saves time on installs. If you work with low-voltage setups regularly, this brand is a no-brainer.
Tomás Reyes
I stumbled on COOLM while upgrading my LED workspace lighting and ended up using their 12V adapters for nearly every project. Everything arrived well-packaged, connectors felt secure, and I haven’t had a single overheating issue. Bonus points for the little converter cables—they make a big difference when dealing with finicky plug sizes. As a DIYer, I want gear that just works. COOLM gets that.
Jennifer Tanaka
COOLM is a solid choice for B2B supply in the low-voltage power accessory segment. Orders are fulfilled consistently, quality is dependable, and the range of specifications makes it easy to standardize across multiple client installations. Safety certifications (CE/FCC) are essential for compliance, and COOLM delivers. Whether it’s for LED retrofits or large-scale surveillance installations, the brand checks every box for professional sourcing.
