BSuunto Wireless Tank Pressure Transmitter for all Suunto Computers ReviewbP PP Suunto Wireless Tank Pressure Transmitter for all Suunto Computers PCompatible with Suunto DX, D9tx, D6i, D4i, D9, HelO2, Vytec DS, and Vyper Air dive computersPGreen blinking light indicates when the transmitter is ON (sending data packets to the dive computer).