Description from sE Electronics:

A RUGGED RIBBON FOR ANY PURPOSE

The second addition to the X1 Series, the X1 R brings the magic of traditional ribbon mics into the modern age with a tough construction that can handle any SPL. This is a ribbon you can take on the road. The sE Electronics X1 R is suited to a variety of recording applications, including guitar cabs, overhead drums, brass, woodwind, strings, commercial broadcast and voice-over. This state of the art ribbon element enclosed by top-grade Neodymium magnets boasts some of our latest ribbon microphone technologies. We have combined our traditional ribbon technology with some of the mechanical elements of our own VR1/VR2 microphone HF (High Frequency) extension technology to bring you a classic sounding ribbon mic with a gentle HF lift. The X1 R comes standard with a mic clip that will securely attach it to any mic stand, but fits the Isolation Pack if a shockmount solution is desired.

HIGHLIGHTS 

• State of the art ribbon element enclosed by top-grade Neodymium magnets
• Classic sounding ribbon mic with a gentle HF lift and high SPL handling
• Integrated HF (High Frequency) extension technology found in the VR1/VR2 ribbon microphones 
• All-metal housing and gold plated XLR connector
• Frequency Range- 20hz to 16khz
• Self Noise-23db
• 2.5 um aluminum ribbon
• Sensitivity- 1.78mV/Pa
• Impedance-200 ohms