Wireless dual system for two guitar with analogue transmission. The most accessible Shure Wireless Dual Guitar System with simple setup and an intuitive interface for performance you can trust in. The Shure BLX188E with 2x MX153 Subminiature Mics delivers professional, precise audio clarity. Perfect for corporate presentations, A/V conferencing and live sound reinforcement, lectures and other speech applications such as houses of worship, the MX153 omnidirectional microphone will give you legendary audio performance right out of the box. Frequency: 518-542 MHz