What XBee Bluetooth modules are used on quad?

Help & Support Robot Parts
1

And does Roboshop still carry these XBEE parts?

2

What do you mean by quad?

You may find all the Xbee bluetooth modules here: https://www.robotshop.com/en/catalogsearch/result/?q=xbee+bluetooth&order=relevance&dir=desc

3

Lynxmotion Symmetric Quadruped Kit. I built one a few years ago.
I’ve studied all the bluetooth modules, and have a few on order. I see one with a DB9 in the Quad’s pix.
Alan