PRO-2009 (200-0109) Accessories Faxback Doc. # 16757 A pair of headphones can be a very useful accessory. In areas where a high noise is present (in a factory, at the scene of a fire or accident, etc.), or when you want to listen privately, use headphones. Your Radio Shack store has a selection for your PRO-2009. Just plug them into the front panel headphone Jack. (LB/all-08/29/95)