The Fenix AER-05 tactical remote pressure switch is compatible with 21700 powered flashlights with a built-in APF (Advanced Pulse Frequency) circuit, including the TK16 V2.0, TK17, TK28, TK20R V2.0, TK20R UE, TK21R, TK22R, TK22 TAC, TK30R, PD36 TAC, PD36R Pro, PD45R, HT18, HT18R and HT30R.

The AER-05 features a round tactical switch which can be tapped for momentary on or fully pressed for constant on, and a long pressure pad for instant strobe. The switch body has a loop fastener for secure attachment and easy removal, plus grooves for attaching with cable ties (4 included).

The tail adapter is made of high strength A6061-T6 aluminium and the connecting cable measures 23 cm.