This RS-27 footswitch is offered as a replacement footswitch for the one supplied with the AS-2000 series, AS-3000 series, or AS-4000 series Transcription kits. Control playback, FF and REW without taking your fingers off of the keyboard! Please note the RS-27 does not come with DSS software required to utilize this footswitch. If you need DSS software with footswitch functionality we recommend you purchase the PC Transcription Kit (AS-2400) or AS-4000 Transcription kit. Both kits contain a version of the DSS software that has footswitch functionality, the RS-27 footswitch, and the E-102 headset. We recommend the AS-4000 kit for business transcription. The DSS Player Pro software included in the AS-4000 kit is geared for someone who needs to track the progress of multiple files or customers such as in an office situation. The software provided in the AS-2400 kit is geared for someone who usually transcribes for one person. Item #147036-410