I have two Interphone F5MC systems for sale, these are both the Pro Sound ones which are considerably better than the standard system. In fact they are both much better than the Schubeth built in system on my C4 Pro, much louder and clearer. One units is specific for a Schuberth C3 or C3Pro The other unit will fit a original Shoei Neotech, a GT Air or J Cruise I mostly used them paired to the phone and Sat Nav but the intercom is also good, Rotax Racer and I had the same units when touring and they worked well over line of sight. We can pair these with different units and systems but please check before committing. It has a really neat microphone which does not get caught when you are using a flip helmet. I found these incredibly easy to use, the instructions are very clear and the button presses much more intuitive with voice feedback of what you have done (much better than the 'tap twice' type instructions). Everything is in the box, but you might need to replace a bit of velcro when I removed the units. Both units have been charged up and checked and all works fine. A couple of reviews and listings https://www.fc-moto.de/en/Interphon...qMvoTxMVc9gzlR_TrGrPna8hnQOn6_RwUHP6ZfbIUQ40k Review https://www.morebikes.co.uk/kit-reviews/14790/interphone-f5mc-bluetooth-intercom-review/ Webbike World https://www.webbikeworld.com/interphone-f5mc-review/ Pro Sound Upgrade https://www.webbikeworld.com/interphone-pro-sound-review/ I'd be looking for £50 each for these including postage, please let me know which version you are interested in. NOTE: I'm away on holiday from Monday for 10 days. I also have an original Shoei Neotech Size M (2014, worn for 3 years and not used since) and a Schuberth C3 Pro Size 56/57 (about 4 years old?) which I was going to sell on FB marketplace but if anyone is interested please let me know, both in reasonable condition, £50 each. Let me know if you are interested, both have a black visor included. Happy to do a deal if someone wants a helmet and the comms.