Sennheiser IE 4, Earphones for Wireless Monitor Applications wireless-body-packs held tight with a friction

held tight with a friction locking knob backed up by a captive steel security pin

the four-part construction can be transported easily and set up in seconds thanks to special multipin connectors

simply hand wash and let air dry (do not machine wash)

Sensitivity: -37 dB (at 1 kHz)

Sennheiser IE 4, Earphones for Wireless Monitor Applications wireless-body-packs held tight with a frictionThe Sennheiser IE 4 is an Earphone for Wireless Monitor applications. Earbuds for wireless monitor applications with outstanding sound quality. Includes exchangeable ear sleeves for a perfect, customized fit for high isolation against environmental noise and a very good bass response. What's in the Box 1 earphone IE 4 3 pairs of ear sleeves (small, medium, large) Product Specifications: Sound pressure level (SPL): 106 dB (SPL) (1mW) Transducer