Auction is for a pair , completely hands free full duplex ( talk and listen AT the same time) range 1200m line of sight headset and boom mic velcros into helmet can use open face helmet water resistant as well . very small place on helmet or in top pocket
has boom mic so can also be used with open face helmet ...

both hands free for connection of strop /ropes tell driver exactly what you are doing and hear him respond save seconds in competitions ,,