Shure BLX288/SM58 Dual-Channel Wireless Handheld Microphone System with SM58 Capsules (H10: 542 to 572 MHz)Key Features For Two Presenters or Performers 2 x SM58 Cardioid Mic Transmitters Dual Channel Tabletop Receiver 123 Auto Scan Frequencies Internal Antenna Diversity 14 Hour AA Batteries Expandable to 12 Mic Channels 300' Range The Shure BLX288 SM58 is a cost effective wireless handheld microphone system for two presenters, teachers, or lecturers which offers quality sound, simple setup, and dependable performance right out of the box. It includes the