Be sure to add me to your favorites list Sony TMR-30 RF Transmitter for Use with Wireless Headphones, Transmitter ONLY. This is a good cosmetic condition, and great working condition Sony RF Transmitter, model TMR30. This is the Transmitter ONLY, no other accessories (no headphones and no 9V Sony power adapter). This unit has a Noise Filter On / Off selector, a Channel selector, a 3.5 mm audio jack input, and 9V Sony adapter input on the back of it, and an antenna and 3.5 mm minijack cable as well. This part is used with the SRS-RF930RK wireless headphone system, and possibly other Sony systems. There are a few marks on it from previous use, with some sticker residue and a scribble of marker on the bottom of it, none of which affect performance. Thanks for looking! Check out my Store!