Luna is a type 4 audiometer built into a headset. This portable and easy-to-use invention is the obvious choice for any hearing screening. The USB headset audiometer is calibrated before it is shipped, so it is ready for use immediately upon delivery. Plug it in your laptop or Windows® tablet and start hearing screening at once. You can choose between manual and automatic tests, and the random automatic test with the default seven frequencies only takes a minute to complete.