What are the differences between Zone USB-C Receiver, Unifying Receiver, and Logi Bolt Receiver?

Zone USB-C receiver is a receiver designed for Logitech Zone headsets, optimized for a seamless and reliable connection between the headsets and your computer, and comes with new features such as smart enumeration. 

Both the Unifying receiver and Logi Bolt receiver work with Logitech keyboards and mice, in which the Logi Bolt receiver is specifically designed for advanced security and high performance in crowded wireless environments.

Unifying receiver

Logi Bolt receiver