Features: Widely used for live stream, Vlog recording, interview, program hosting, podcast, presentation, church, wedding, etc. 20 UHF selectable frequencies are adjustable of each set, offering stable signal transmission and avoiding signal interference. Multiple sets can be used at the same time without frequency interference. Each transmitter supports electronic volume control up to 15 levels. You can mount the receiver to a DSLR camera, XLR camcorder, smartphone, or laptop. The receiver is equipped with a monitoring headset port for real-time monitoring of recording effects. Built-in 650mAh rechargeable lithium batteries in both receiver and transmitters ensure a long working time. The operating range is up to 80m (in open area), ideal to capture the audio in a large scene.