rx6000 crystal receiver rx6000 radio modules are credit card sized, crystal controlled, receivers. they have a sensitivity of better than -112dbm with low power consumption. tx6000 crystal, half watt transmitter the tx600......rx6000 crystal receiver rx6000 radio modules are credit card sized, crystal controlled, receivers. they have a sensitivity of better than -112dbm with low power consumption. tx6000 crystal, half watt transmitter the tx6000 radio module is a credit card sized, crystal controlled, half watt transmitter. it has a fast attract time and low power consumption. the radio module rf power can be adjusted from 5mw to 500mw with a frequency range of 400mhz to 475mhz.