Suunto Wireless Tank Pressure Transmitter is compatible with all Suunto air-integrated dive computers (except Suunto EON Core, & Eon Steel), including D9, DX, D9tx, D4i, D4i Novo, D6i, D6i Novo, Vytec, Vytec DS, Vyper Novo, Vyper Air, and HelO2.
Diver-replaceable batteries