The Amcom II Series 2820 and 2825 are the most versatile and powerful two diver communicators on the market today. The 2825 Series includes a hand-held push-to-talk microphone and separate volume controls for each diver. Both divers can be set up on Simulcom or push-to-talk, or one diver on Simulcom and the other diver on push-to-talk mode, or any combination of the two modes.