BOYA BY-WM3 is a 2.4 GHz wireless microphone system, all-inclusive solution that makes it ideal for capturing clear sound.Smart microphone set from BOYA, which contains a transmitter and receiver with Lightning cable, so it can be used by telephone. The microphone is designed for videographers, content creators, avid vloggers. Once connected and turned on, it is set and ready so you just have to focus on creating content. The charging case can keep the transmitter and receiver charged while on the go.Features:2.4GHz Wireless Transmission techologyOne-touch Pairing,Fast Focus Recording SubjectLightweight and Low-Profile DesignFast-charging with Charging case, Longer continuous Time for RecordingAlternative Types of AdapterMuting FunctionProduct specifications:Transmission Type:     2.4GHzPolar Pattern:     OmnidirectionalFrequency Response:     20Hz-20KHz (±3dB)Distortion:     ＜0.1%Sampling Rates:     48kHzBit Depth:     16BitSignal-to noise ratio:     75db or moreSensitivity:     -42dB±3dB (1dB=1V/Pa@1kHz)Operating Distance:     20m(without obstacle)Power Consumption:     TX: 80mW RX: 60mWWorking Time:    TX: 4.5 hours x two timesRX: 8 hours x two timesCharging Time:TX:2 hoursRX:2 hoursCharging Case:2 hoursCharging Port(Charging Case):     Type-CBattery capacity:TX: 100mARX: 100mACharging case: 1000mASize:Charging case: 120 77 30.5 mmTX: 51.8x15.6x18mmRX: 54x15.6x15.6mmWeight:TX + RX + charging case: 129gTX ： 10.5 g RX ： 9.5 gThe box contains:Charging CaseClip-on Minature TransmitterProfessional Compact ReceiverMFI Certified Lightning Adapter3.5mm TRS Adapter3.5mm TRRS AdapterFoam WindshieldFur windscreen30cm Type-C to USB-A Charging Cable