Mark-I is the complete turnkey solution for narrow range precision spectroscopy applications. With 2nm full tuning range and 10fm resolution, Mark-I is the ideal system for Whispering Gallery Mode (WGM) research and gas sensing. Mark-I encloses 10+ years of WGM applied research excellence and ensembles racks of complicated lab-grade instruments in to an affordable elegant turnkey box that has a footprint of less than an A4 printing paper.Mark-I includes a 1300nm DFB laser and is optionally compatible with any 14-pin butterfly packaged laser source. (ex. 1060nm, 1550nm DFB/DBR, etc.) All the laser control, spectrum acquisition, and spectrum analysis is completed through the included software which is preloaded in the included laptop.