Fantasea FRX100 VA Vacuum Housing compatible with Sony RX100 III-IV-V-VAThe FRX100 VA Vacuum Housing was specially designed for the Sony Cyber shot RX100 III, RX100 IV, RX100 V and RX100 VA digital cameras. The FRX100 VA Vacuum Housing features the Fantasea Hybrid Vacuum Safety System (included with the housing), which contains both a pre dive vacuum check and an on dive leak detector. The system allows confirming the watertight seal of the housing prior to the dive using the vacuum system and monitoring the housing seal