Schuberth helmets for intercom C3 Pro / E1, Up to three motorcyclists can communicate simultaneously with the SRC-System™. Under ideal conditions the range is up to 700 metres. The VOX (Voice Operated eXchange) technology permits voice-controlled operation of main functions such as call recording and call acceptance. The connection between a mobile phone with Bluetooth capability and SRCS is extremely simple to set up. Incoming calls can be accepted with a voice command and using the keys of the SRC-System. This also applies for navigation devices with Bluetooth capability. After the SRC-System has been connected to the GPS device, the rider can receive the voice instructions conveniently over the two ear-phones. Most commonly available MP3 players can be connected to the SRC-System via the multifunctional USB interface. If the MP3 device supports Bluetooth A2DP technology, no cable is required. The SRC-System™ adjusts the volume automatically according to the background noise. The integrated VHF radio now enables you to listen to your favourite station and important traffic announcements while you are travelling. The antenna which is already integrated into the S2 as a standard feature guarantees top-quality reception at all times. Thanks to the RDS function the strongest signal for the selected frequency is always picked up, even at high speeds. You can store up to six radio stations. Always keep up to date. The latest version of the SRC-System is always available to you as a download. If you register your SRC-System, you will be informed by email as soon as a software update is available.