What generation of Philips Hue Bridge do I have?

If you might want to know what generation (2012 or 2015) of the Philips Hue bridge you have, you should read this post. It easy to see which generation you have

Philips Hue Bridge, Everything You Need to Know!

Philips Hue LED LightStrip Plus with Extension + Hue Bridge 2nd Gen Certified (Certified Refurbished)

Philips Hue 55 Play Gradient Lightstrip + Hue Bridge 2.0 (2nd Gen) Bundle

Philips HUE 2nd Generation Bridge 2.1 Hub Power Supply and Network Cable

How To Add Hue Bridge to HomeKit - Smart Home Corner

How to control two Philips Hue bridges at the same time with Yeti - Yeti Blog

Okay so I have 3 philips hue smart bulbs that do the white and the color changing. I want to get another one, but know nothing about it. Is this the “hub?”

Hue

Philip Hue V1 Hub: Here's what you need to know

The Philips Hue Bridge is the control center that allows you to control all your Philips Hue products via the Philips Hue App. Once you've installed the Philips Hue Bridge and loaded the Philips Hue app onto your smartphone or tablet you're ready to let your imagination run wild and create your own personal system. The bridge is powerful enough to regulate up to 50 lamps and luminaires. Take Hue to your entire home.

Philips Hue Stand Alone Bridge, White

Philips Hue - The Smart Setup for Your Smart Lights

What's the Difference Between The Philips Hue Bridge Gen 1 vs 2

Good used condition.

Genuine Philips Hue Bridge Hub 1st Generation Zigbee IP Bridge CE0979 Round

Hue Bridge - Smart Control for your Lights