Perfect accessory for a large array of Zoom products * Bring out the full potential of your Zoom equipment * Compatible with the 503, 504, 505, 506 ,507, 508, 509, 510, RT323, RT123, RT234, RFX2000, 2020, 3030, 4040, 1202, MRS1044, 4040, 9120 and many other Zoom products.