The RRFAN100A is an infrared remote control designed as a compatible substitute for the Lasko T38400 Hybrid Tower Fan. This remote operates the fan's speed settings, oscillation, timer function, and power controls from a distance. It uses standard IR technology to communicate with the fan unit, providing convenient operation without requiring direct access to the device. The RRFAN100A maintains full compatibility with the T38400 model's control specifications.