FENIX AER-03 V2.0 Remote Switch

The AER-03 V2.0 is Fenix's pressure-activated remote switch designed for torch mounts on Picatinny rails: it lets you switch the light on, off, or into momentary mode without taking your hand off the grip. The PU cable measures 23 cm, giving a total assembly length of 34 cm — enough to reach any grip position comfortably on a rifle or carbine.

The pad is silent — no mechanical click — which matters in night hunting or professional contexts where actuator noise is not a neutral factor. The tail adapter has a diameter of 26.5 mm with a Tr24 x 1.5 mm thread pitch, making it compatible with Fenix models that use this interface: TK16, TK20R (on/off only), TK25 R&B, TK25 Red, TK25 UV, TK26R, and TK32. Before purchasing, check your model against the list: compatibility is not universal, and on some torches mode selection is not available through this switch.

Weighing 40 g, the V2.0 is IP68-rated: waterproof to 2 m depth and fully dustproof. It mounts to the stock or torch body using zip ties or hook-and-loop tape, both included — a practical solution that takes a few minutes of initial setup to route the cable securely without interfering with other controls.

Key points

• Silent pressure pad: no click, suitable for contexts where switch noise matters.
• 23 cm cable (total length 34 cm): reaches the grip without constraining the torch position on the rail.
• IP68 to 2 m: no additional protection needed in heavy rain or shallow water crossings.
• T6 aluminium adapter, Tr24 x 1.5 mm thread: solid construction, standardised tail interface for the compatible Fenix family.
• Zip ties and hook-and-loop tape included: quick installation, cable routing adjustable without tools.

In the box

• AER-03 V2.0 remote switch
• Zip ties
• Hook-and-loop tape