Seafrog VP 100 Vacuum Pump Handle & Alarm Alertor Detection System for Seafrogs Underwater Photography Diving Waterproof Camera Housing Case Cover Shell

The vacuum pump system is used for checking the water tightness of underwater camera housing before submerging The complete electronic circuit and the battery are located in the robust anodized aluminum one-way valve body for even more convenient operation and ease of installation VPS-100 features a calibrated pressure sensor and processor and the The green/red LEDs are visible through the transparent acrylic circular window The installation is simple and straightforward, just screwing the detector into the accessory port, draw a vacuum on your housing and wait for few minutes, then you can check the water tightness immediately For Sony A7 III A7R IV III A9, for Panasonic GH5, for Nikon Z6 II Z7II Camera hoursing with Vacuum Pump System Design (More compatible models please check the description)