STM DDD 03N Dolphin Dissuasive Device

The devices are to be placed according to the fishing method and the best strategy. 
It works with internal (sealed) 1,6 Ah NiMH rechargeable batteries, to be charged from the external poles through the STM special battery chargers. The device gives acoustic warning before the batteries run out.
Weight: 950 gr. Height: 225 mm. Diameter: 61 mm. 
Maximum depth: 200 m. (20 bar); minimum 10 m. Tested pressure: 30 bar.