This is a simple breakout board for the E73-2G4M04S, an inexpensive nRF52832 module first found and reported by NCA78. The module is presently available on both ebay and aliexpress for less than $5, including shipping cost: http://www.ebay.com/itm/nRF52832-E73-2G4M04S-Low-Power-2-4GHz-SMD-Wireless-Module-with-PCB-IPX-Antenna-/192237288810?hash=item2cc23c3d6a:g:AAkAAOSwceNZWw60

This breakout board converts the 1.27mm pin pitch of the E73-2G4M04S module to a breadboard friendly 2.54mm pitch.