The FIFINE K037 UHF Wireless Lavalier Microphone System delivers reliable, high-quality audio for live performances with a stable signal range of up to 50 feet. Unlike VHF systems, UHF is less susceptible to interference from local radio stations, ensuring clear sound. This system features 20 selectable channels, allowing you to switch to a clean frequency if needed. The easy-to-read LCD screen on the transmitter shows the transmitting frequency and remaining battery life, while the receiver's indicator flashes green for low battery. The cardioid polar pattern of the lavalier mic reduces unwanted noise and plosives, providing crisp audio. Ideal for use with speakers, mixers, and sound boards with a 1/4" output. Note: This system is not compatible with phones, computers, or Apple products.