SPECIFICATIONSBrand Name: NoEnName_NullBuilt-in Battery: NoChoice: yesCommunication: WireLessDiaphragm: S-MallHigh-concerned chemical: NoneOrigin: Mainland ChinaSet Type: Transmitter SetsStyle: Handheld MicrophoneTransducer: Condenser MicrophoneUse: Karaoke Microphonesemi_Choice: yesFeatures:1. [High capacity battery] Long battery life of 12 hours, with longer usage time of large battery capacity.2. [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.3. [UHF chip] UHF high-frequency intelligent chip, using selected digital chips to wirelessly process audio signals.4. [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.5. [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.Specifications:Frequency range: 610.50~669.50MHzOscillation mode: DSP chip frequency lockingFrequency stability:+10PPMRF power: 10DBMAudio frequency response: 40-18000HZReceiving sensitivity: -95~-71DBMSignal to noise ratio:>90DBAudio output: 350MV (maximum)Packaging list:One drag one:1 * Microphone1 * Receiver1 * Charging cable1 * 6.5 to 3.5 conversion head