SE112-GR Sound Isolating IEM Earphones with Dynamic Drivers GreySE112 Professional Sound Isolating Earphones provide great sound and durable build quality through a single, dynamic driver. Discrete, secure design includes a fixed, 3. 5 mm (1 8) audio cable that can be worn over the ears or hanging down based on preference. Sound Isolating technology blocks up to 37 dB of outside noise. Includes a carrying pouch and fit kit with selection of sleeves for custom fit. Fixed cable design allows for earphones to be worn