SKM9000 Wireless Microphone Professional UHF Frequency Adjustable Metal Sheel For Paryt Show Teaching Wedding. [High capacity battery] Long battery life of 12 hours, with longer usage time of large battery capacity. [Intelligent noise reduction] Intelligent noise reduction dynamic microphone core, restoring classic vocals, with spacious and flat frequency response, high sensitivity, crisp high pitched, delicate mid pitched, and stable low pitched, ensuring vocal clarity. [UHF chip] UHF high-frequency intelligent chip, using selected digital chips to wirelessly process audio signals. [Infrared automatic frequency alignment] The receiver and microphone adopt an automatic frequency alignment method, which is connected in 1 second upon startup without the need for settings. [50M receiving distance] The distance is beyond imagination, with sensitive reception and strong signal at longer distances, making it easy to pass through walls. It can be used indoors or outdoors. Frequency range: 610.50669.50MHz. Oscillation mode: DSP chip frequency locking. Audio frequency response: 40-18000HZ. Signal to noise ratio:>90DB. Audio output: 350MV (maximum). 1 6.5 to 3.5 conversion head. We are sure that we can provide a solution that makes you satisfied. We usually respond within 24 hours on weekdays. Thank you for shopping with us!