SRC-pro This Schuberth SRC system is a rider communication system which can be fitted into the Schuberth C3 Pro helmet enabling rider communications. This device can be fitted within the acoustic collar of the C3 Pro and features a wide range of functions. The SRC system enables rider to passenger intercom, bike to bike intercom, mobile phone and GPS connection. With Automatic Gain Control (AGC) the system also adjusts the volume automatically according to the background noise - sensitivity can be configured individually with the software supplied. Making full use of the Antennae within the C3 Pro, VHF radio reception with RDS is possible with high-speed selection of the six strongest radio channels in the vicinity at the press of a button. .