Rf solutions fobber 8t series 868mhz keyfob transmitters rf solutions fobber 8t1 the rf solutions fobber 8t1 is a single 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 an