From Nikon:
WR-1 Firmware v.1.01
Changes from Firmware Version 1.00 to 1.01:
Cameras That Can Be Used to Update WR-1 Firmware
D5, D4S, D4 (*), Df, D810A, D810, D800 (*), D800E (*), D750, D500, D7200, and D7100 cameras
* Firmware versions “A” 1.10/“B” 1.10 or later. Firmware upgrades can also be performed for you by a Nikon-authorized service representative.
Download: Nikon WR-1 Firmware v.1.01
Firmware Ver. 3.00 upgrade details
Shooting using radio-controlled advanced wireless lighting (hereafter "radio AWL") requires a digital SLR camera and Speedlight that support radio AWL, as well as a WR-R10. However, WR-R10s running a version of firmware prior to Ver. 3.00 do not support radio AWL. The modifications indicated below, including support for radio AWL, will be enabled with this firmware upgrade.
Modifications enabled with firmware Ver. 3.00
Requesting firmware upgrade
Those who would like to have their WR-R10 firmware upgraded to enable support for radio AWL may take or send their WR-R10 to a Nikon authorized Service Center where the firmware will be upgraded free of charge.
Please direct inquiries regarding this matter to your nearest Image Nikon Service Center or create a Free Service Returns Request.
B&H carries the Nikon WR-1 and WR-R10 remote controllers.