Sea Frogs Flash trigger for fibre-optic cables (Updated Version)

Works great, battery is limited by time rather than by number of flashes (I managed to get hundreds of flashes within the first two hours from turning it on; after a few more hours of being on the battery runs out on its own). Fits my Nauticam case, just had to put aluminum foil to reflect more light to the port and prevent light leaking into the dome from the inside)