I plug mine directly into first stage. The fewest connection joints possible. I leave the transmitter on reg , and carry it with me when traveling. I have 2 HP ports on my regs so backup spg is not an issue. On my rec reg I have a button gauge backup. For doubles I use a regular SPG bolt snapped to D ring. For rec dives I wouldn't have a problem going without a backup spg.
Unless you hold hands with your wife when you dive, you probably won't be able to receive her xmitter signal.
Unless you hold hands with your wife when you dive, you probably won't be able to receive her xmitter signal.