Review on 📞 Eartec UL3D Wireless Intercom System - Full Duplex 2 Way Communication for 3 Users with ULDM Dual-Ear Master Headset and 2-Pack of ULDR Dual Ear Remote Headsets by Jackie Smith

My wife and I had communication problems working together when using our tractor or chainsaw. We tried them yesterday when I fell out of a tree. They worked surprisingly well, two out of three worked. The third slave burned the battery every ten minutes. I bought six batteries and one was defective but Revain replaced it the very next day. Just a moment. Each headset operates on a different frequency, so you can talk at the same time and still be heard. Not sure how they work when using more than one slave at a time.