Description Booma RC Pin Flag Switch. The AR Pin Flag switch is a ultra high quality fail safe switch designed for use with The Advanced radio Smart range of products. Compatible with Smooth Flite, Smart Buss RRS and ARXL, Smart Switch, Q-Switch, Multi Switch and Reg Switch. PLEASE NOTE: Not compatible with Spektrum, Smart Fly or Smart Bus Extreme. This kit also comes with a High Bright Blue LED for easy day time visibility. Supplied with 1 x switch actuator. 1 x pin flag