Scope of delivery:2x PATONA Premium microphone, 2x PATONA windscreen for microphones, 1x PATONA Premium receiver, 1x storage bag, 1x USB-A to USB-C cable, 1x QR code for instructions The PATONA lavalier microphone (also known as a lapel or tie microphone) is a small, portable microphone that can be attached to clothing near the mouth of the speaker or performer. Our lavalier microphones are omnidirectional, which means they can pick up sound from all directions.PATONA lavalier microphones are lightweight at 5.2 grams each, discreet and unobtrusive to increase comfort and minimize visibility.Specifications: Power: DC 5V 1A Radio frequency: 2.4GHz 2.44GHz,Receiver connection: USB-C (smartphone and tablet),Working current: ? 11mA Standby power: 55uA, Response frequency: 20Hz 20KHz,Sensitivity: 35dB, Sampling rate: 48K,Signal-to-noise ratio: 75dB,Power supply for the microphone: built-in Li-Polymer battery with 50mAh, Charging: USB-C port, Weight per microphone: 5.2g, Weight transmitter: 4g, Dimensions microphone: 51 x 14 x 18mm, Dimensions transmitter: 46 x 2.7 x 9mm Note: The receiver is plugged into the USB-C port of the smartphone. To charge the smartphone, please connect your conventional charging cable to the USB-C port on the receiver.