AMEC SB-181 TX Switch Box [AMEC-SB181-010] Cartography | Garmin BlueChart Foreign Voltage - Input Range (Volts):

Voltage - Input Range (Volts): 8-16v

Connect the cable to your computer's USB port to recharge your compatible device and to transfer data to and from your computer

Pressure Transducer 0 to 3 PSI - for the FPM100 Fluid Pressure Monitor

A toroidal transformer provides a high peak power surge capacity

The unit can also act as an AIS/GPS receiver only if MMSI and specific boat data are not available

AMEC SB-181 TX Switch Box [AMEC-SB181-010] Cartography | Garmin BlueChart Foreign Voltage - Input Range (Volts):SB 181 TX Switch Box The TX Switch Box SB 181 is specifically made to work with AMEC AIS Class B transceivers, both the 2W and 5W series. With its simple and robust design, silent mode (AIS transmission disabled) can be activated easily. Owner's Manual (pdf)