The professional electronic switch has an SOS distress blinker and a variable power setting switch with 25%, 50%, 75% or 100%.
As an optional extra, the compact lamps can also be fitted with this variable power setting.

The professional lamps are equipped with a borosilicate glass lens as standard, with a temperature shock resistance of 300°c (570°f). In practice this allows the lamp to be used above water and then quickly immersed into ice cold water without the lens crazing or breaking.
As an optional extra, the compact lamps can also be fitted with this special lens.