Features 1.Noise Filtering: Professional dynamic microphone core, special added sound filter cotton canister to filter out the noise, so that the sound output more clear. 2.Stable Signal: Dynamic microphone signal transmission is stable and interference free, and the effective receiving distance is up to Approx. 50meter/164ft. 3.Automatic Connection: Mini portable receiver, automatic connection to the microphone when open, easy to use. 4.Plug and Play: Rechargeable microphone wireless is suitable for most 6.5mm and 3.5mm voice frequency devices, plug and play, very convenient. 5.Metal Mesh Head: Karaoke mic adopts metal mesh head, which can better defend the microphone core from damage. specificationItem Type: Wireless Dynamic Microphone Material: ABS Modulation: Fixed Frequency Frequency Range: 700 to 800MHz Preset Frequency: Auto Pairing Frequency Response: 50Hz to 15khz Maximum Frequency Deviation: 50KHz (With Level Limit) Distortion:0.01% Signal to Noise Ratio:98DB Effective Reception Range: Approx. 50meter / 164ft RF Carrier Stability:+0.005%(-10C to 50C) Battery Type: Lithium Battery Receiver Battery Type: 1x18650 Battery (Not Included) Handheld Microphone Battery Type: 1x18650 Battery (Not Included) Microphone Carrier Frequency Power: 30mW PackageList 2 x Microphone 1 x Receiver 1 x User Manual 2 x Anti Slip Cover 1 x 3.5mm to 6.5mm Connector 1 x Charging Cable NoteBattery Not Included