There are 3 models in the Audix MICRO S Miniature Condenser Microphone range.  

1. M1250B     2. M1255B     3. M1280B

 

M1250B (Spec sheet here)

M1255B Higher output for distance (Spec Sheet here)

M1280 (Spec sheet here)

 

Each model has 4 caption options. 

1. Cardioid   2. HYPER Cardioid   3. Omni   4. Shotgun

MicroS