Shure BLX188E/SM35 K3E: 606-630 MHz

Wireless dual headset system with two SM35 cardioid condenser headset microphone. The BLX188E/SM35 Wireless Dual Headset System with two SM35 features a durable, industry-standard microphone cartridge in a comfortable headset design for hands-free performance combined with simple setup and an intuitive interface for performance you can trust. Frequency: 606-630 MHz