PANASONIC KX-TGA936 EXTRA HANDSET BLACK DROP & SPLASH RESISTANT EXPANSION CORDLESS HANDSET This model can be used with the KX-TG9361B, KX-TG9371B, KX-TG9372B, KX-TG9331T, KX-TG9332T, KX-TG9332S, KX-TG9333T, KX-TG9334, KX-TG9341T, KX-TG9342T, KX-TG9343S, KX-TG9343T, KX-TG9344T, KX-TG9348T, KX-TG6311S, KX-TG6312S, KX-TG6313S, KX-TH1201B, KX-TH1211B and KX-TH1212B only Drop & Splash Resistant phones are tough enough to have passed the U.S. Army's Mechanical/Transit Drop Test, meaning that they qualified to survive in the field!