The black RAM3 allows you to remotely control all functions of Standard Horizon fixed mount VHF radios which include the Standard Quantum, Matrix, Quest-X, Quest+ and Phantom series VHF's. Full dot matrix display and soft keys make operation simple and fast. Additional features include turning the VHF on/off and all DSC functions including distress. When connected to the Matrix GX3000S or the Quantum series, this remote station microphone also controls the 30W Hailer/PA functions. Additional features include: Remotely control all Radio, DSC, PA/Fog* functions of connected Standard Horizon VHF, Intercom function between RAM 3 and connected radio, and between RAM3 to RAM3*,Speaker Microphone with Noise Cancelling Clear Voice Technology, Backwards compatible with the following models: GX1256, GX1280S, GX1500, GX3000, GX2360, GX3500, GX5000, GX5500, CPV350, CPV550, PS1000 and PS2000, Three user programmable soft keys, Full Dot-matrix LCD display, 23' of routing cable and waterproof panel mount connector, External speaker wires available at RAM 3 routing cable connection, IPX7 Submersible 3 ft for 30 minutes, Three year waterproof warranty.