Rf solutions fobber 8t series 868mhz keyfob transmitters rf solutions fobber 8t6 the rf solutions fobber 8t6 is a 6 button 868mhz fm keyfob radio transmitter employing frequency shift keying fsk the multi function versatile transmitter is capable of a range of up to 150mthe transmitter contains a unique serial number and can be paired with several rf solutions rf receivers the receivers sold separately vary from miniature smt modules to complete housed relay units with digital and ser