5v Power Supply is utilized for Cisco IP Phones Such as SPA300, SPA303, SPA500, SPA501, SPA502, SPA504, SPA508, SPA509, SPA512, SPA514G, SPA525G2, SPA900, SPA922, SPA942, and SPA962.

Since the phone doesn’t have this. It is a great add on. Works fine. In use for over five years now. No issues

I recently purchased this 5V power adapter for my Cisco SPA525G2 IP phone, and it's been working flawlessly. The adapter fits perfectly and powers the phone without any issues. It's a great replacement for the original power supply, delivering consistent performance. The build quality feels solid, and the cable length is adequate for my setup. Overall, a dependable and cost-effective solution for powering your Cisco IP phone.

The cable on this plug in transformer is over 68" which is very impressive. I have charged a dozen items rated for 5V and this transformer handled them all without overheating. That is amazing because the output is only rated for 2 Amps. Even though it does a great job I think the package could be smaller considering that its maximum current output is about the same as most USB-A or USB-C chargers and those bricks are much smaller.

Cord is about 70 inches long. Works as intended! Will update review if device fails or any issues arise!