The Point Source Audio CM-i5 in-ear intercom headset provides a lightweight solution for audio monitoring. Its patented in-ear design eliminates fatigue while providing excellent noise isolation. You'll enjoy the ability to switch between three listening modes: left, right, or left and right for creating your ideal mix. The detachable and replaceable in-ear headphones make it easy to personalize the headset to your needs or replace as needed. At only one ounce, the CM-i5 in-ear intercom headset is a fraction of the weight of comparable headsets, ensuring all-day comfort.