Pin-Pin replacement of ECG004, ECG006, NGA-386, SGA-4286, SGA-4386, SGA-4486, GALI-19, GALI-29, GALI-S66, ERA-33SM, CGY62E6327, RF3377. Could be used in base-station, repeater, CATV, radio speaker. SOT-89 package. You could visit www.prewell.com