Specification: Item Type: Wireless Lavalier MicrophoneMaterial: Plastic, ElectronicMicrophone: Digital Silicon MarkInput Voltage: 5VBattery Life: 5-6 HoursSignal to Noise Ratio: 64DBM 3 Step Noise ReductionTransmission Delay: 30MSSensitivity: -42dBFrequency Response Range: 20-20KHzTransmission Distance: Barrier Free 20m/65.6ftBattery Type: 1 x Built in 60mAh (Microphone) , Built in 300mAh (Charging Compartment) Lithium ion BatteryFeatures: 1Plug and Play: Clip the wireless microphones to your collar, plug the receiver port into your device, and they connect automatically. Plug and play directly, no need for APP and bluetooth. 2Noise Reduction: Wireless lavalier microphone has a built in professional grade intelligent active noise reduction chip; uses digital processing technology to reduce noise, HiFi sound quality, and deeply restore original sound. 3Professional Design: Wireless microphone is specially designed for YouTube, for Facebook Live, for TikTok creators, for Vloggers, for Bloggers, for YouTubers, for Podcasters, for Interviewers and other video recording enthusiasts. Say goodbye to messy cables and poor noise cancellation. 4Low Latency: Easy to connect and cover 666 feet of signal with 0.009 second transmission delay, helping you reduce power failures and record or shoot video clearly at longer distances. Dual diaphragm 360 surround pickup, more accurate catch of sound details. 5Compatibility: Wireless lapel microphone is compatible with mainstream devices on the market, supports 99% of mobile phones, computers, sound cards, cameras and camcorders, and is perfectly compatible with for Android and for iOS systems.PackageList: 1 x Charging Compartment1 x Microphone1 x Receiver1 x Charging Cable1 x Manual