Two Diver Communicator Amcom II.
Audio Power Output: 22 Watts per channel.
Frequency Response: 300Hz to 12kHz.
Isolation Transformer: Split Bobbin Medical Grade.
Dimensions: 10 in. H x 9 in. W x 14.5 in. L (25.4 cm x 22.9 cm x 36.8 cm).
Weight: 22.5 lbs (10.2 kg).
Power: 110/220VAC 50/60 Hz (automatic sensing), or Internal Batteries 12VDC.