The kacallap Wireless Lavalier Microphone system features 100 selectable channels, with two groups (A and B) for flexible use. It has a working distance of up to 330 feet in open areas and 200 feet with obstacles. The system includes two transmitters, one receiver, a clip microphone, and various cables and accessories. The RF power output can be adjusted for optimal audio quality, and real-time audio monitoring is possible with a headphone jack. The system has a clear LCD display for easy parameter adjustment and offers omnidirectional wireless microphone capabilities for professional audio recording. It can be powered by two AA batteries or a 5.0v DC external microUSB power supply.