Item Type: Wireless Lavalier MicrophoneMaterial: Plastic, ElectronicsMicrophone: Digital Silicon MarkInput Voltage: 5VContinuity: 10 HoursSNR: 64dbm 3 Step Noise ReductionTransmission Delay: 30msSensitivity: -42dbFrequency Response Range: 20-20KHZTransmission Distance: 20m/65.6ft Without ObstaclesBattery Type: Built in 60mAh x 2 (Microphone) Lithium Ion Battery (included)Package List2 x Microphone1 x Receiver1 x Charging Cable1 x Manual1Plug and Play: Wireless lavalier microphone comes with a clip that clips onto your collar, then plug the receiver port into your device and it will automatically connect. Plug and play, no APP or Bluetooth required. 2Noise Canceling: Wireless lavalier microphone has a built in professional grade intelligent active noise cancellation chip; hifi sound quality, deep restoration of the original sound; dual diaphragm 360 degree surround sound pickup, accurate catch of sound details. 3Widely Applicable: Wireless lavalier mic is designed for YouTube, for Facebook live streaming, for TikTok creators, Vlogger, Blogger, for YouTuber, podcasters, interviewers and so on. 4Long Range: Wireless lapel mic can cover 666 feet with 0.009 seconds transmission delay, helping you reduce power failure and record or shoot video clearly from a distance. 5Compatible: Wireless lavalier microphone is compatible with mainstream devices on the market, supporting 99 percent of cell phones, computers, sound cards, cameras, camcorders, perfectly compatible for Android and for IOS systems.