The Fenix AER-04 Tactical Remote Pressure Switch (brand part no. FX-AER04) is a rail-mounted remote switch made for select Fenix tactical flashlights. It allows quick momentary-on activation at the brightest level via the pressure pad, or constant on through the tactical switch. It attaches with either included cable ties or a hook-and-loop backer, and it’s IP68 rated dustproof and waterproof to 2 meters. The AER-04 is purpose-built for current Fenix models including the HT18, HT30R, PD36R PRO, PD36 TAC, TK16 V2.0, TK20R V2.0, TK20R UE, TK22 TAC, TK22 UE, and TK30 — note that it is not compatible with the standard PD36R.

Key Specifications

• Activation: pressure pad for momentary-on, tactical switch for constant-on.
• Mounting options: cable ties or hook-and-loop backer (included).
• Waterproof rating: IP68, submersible to 2 meters.
• Compatible Fenix models: HT18, HT30R, PD36R PRO, PD36 TAC, TK16 V2.0, TK20R V2.0, TK20R UE, TK22 TAC, TK22 UE, and TK30.
• Not compatible with the standard PD36R model.

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Frequently Asked Questions

Does the AER-04 fit the standard PD36R? No — it is not compatible with the PD36R, only the models specifically listed by Fenix.

Is it waterproof? Yes, it carries an IP68 rating and is submersible to 2 meters.

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