guys does anyone knows what this is for? is it a telemetry module?i mean dont i need to buy a new telemetry module with tx and rx ?

http://www.banggood.com/Wholesale-Flysky-FS-GT3-Telemetry-Module-FS-RM002-For-2_4G-9CH-FS-TH9X-Transmitter-p-66598.html

i suppose this comes with the flysky 9ch tx rx i have it already on my tx anyone pls help......
thank u

This one is a normal module comes with 9x and doesn't have telemetry.