The In-Ear Monitor ET IEM1 products are made with a single Balanced Armature receiver, that is able to reproduce the full range of excellent high-medium-low frequences. The ET-IEM1 allows an isolation of 26 dB and is ideal for emerging musicians, first time users, and for all music lovers who want a better quality of listening. Like other In Ear Monitors, the earfonik IEM are compatible with wireless transmission systems and portable media devices.