Replace your Ikelite flash bulkhead with this compact, independently sealed device, for reliable fiber optic triggering of a compatible fiber optic underwater strobe. High frame rate burst shooting is supported when used with an Ikelite DS160, DS161, or DS230 Strobe and High Sensitivity Optical Converter # 4405.
The transmitter is powered by two CR2032 lithium single-use or rechargeable batteries (not included). The Transmitter has a built-in power save mode which prolongs battery life. Expect at least a week of diving out with average use. It is always recommended to travel with a spare set of batteries.

Connection to a new style flash hotshoe is required, included with DL and DLM housings shipped from Ikelite after January 1, 2025 (serial number 81200 and higher). Older housings require a new hotshoe.
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Housing, strobe, and hotshoe compatibility information is listed below.
Typical Uses
- You want to use one of the entry-level strobes that don’t have an electrical bulkhead.
- You want to use fiber optic cords to eliminate extra waterproof connections.
- You want to disconnect your strobe cords underwater for some reason. Imagine getting back to the boat at the end of a dive and wanting to shoot some split shots using natural light without having your strobes weighing you down. With fiber optic cords you can pop them off, use our unique quick release mount to disconnect your strobe arms, and hand the whole assembly up to the boat crew.
Housing Compatibility
- All Ikelite 200DL Underwater Housings*
- All Ikelite 50DL Underwater Housings*
- Ikelite 200DLM Underwater Housings* for cameras with an electrical flash hotshoe EXCEPT for Olympus OM-D E-M10 Mark III, IV # 69531
- Not designed for use with other manufacturers' housings.
* Housings produced before January 1, 2025 (Serial # below 81200) require a new hotshoe for use with this converter. Refer to the hotshoe compatibility table above for more information.
Strobe Compatibility
- Ikelite DS-series strobes combined with Optical Converter # 4405
- INON S-2000, D-2000, Z-240, Z-330
- Backscatter Mini Flash MF-1, MF-2
- SEA&SEA YS-01, YS-D2, YS-D3, YS-D3 II
- Symbiosis SS-2
- Retra Underwater Flash
- Weefine WFS07
- Kraken Hydra 15000
We were not able to get consistent operation from the Kraken KR-SO2 strobe.
Hotshoe Compatibility
This product is compatible with the hotshoes included with the purchase of any 200DL, 50DL, and select 200DLM underwater housings shipped on or after January 1, 2025 (serial number 81200 and higher).
- C3 Auto Hotshoe for Canon # 46003-CAN
- P3 Auto Hotshoe for Olympus, OM System, Panasonic # 46003-LMP
- NL4 Auto Hotshoe for Nikon (Left) # 46003-NKL
- NR4 Auto Hotshoe for Nikon (Right) # 46003-NKR
- S3M Manual Hotshoe for Sony # 46003-SYM.
If you have a housing below serial number 81200 with the old style connector system, it is necessary to purchase a new hotshoe.
In the Box
- Manual Fiber Optic Transmitter
- Battery holder
* requires 2 x CR2032 batteries not included
** requires compatible flash hotshoe not included