BY-WM3T2 series is a mini 2.4GHz wireless microphone system that provides high-quality sound for live streaming, vlogging, course recording, and other audio-capturing App. Compact and lightweight, the combined weight of the TX and RX is no more than 15g, making them very portable When the BY-WM3T2-D2 receiver is plugged into a smartphone, the phone can be charged via Type-C charging port on the receiver The built-in rechargeable battery of the transmitter provides up to 10 hours of run time, which helps you get a full day of audio recording No Adapter, Bluetooth-compatible or Application is needed. Just plug the receiver lightning port into your devices, then turn on the portable mic, these two parts will pair automatically Smart noise cancellation technology can effectively identify the original sound and can record clear sound in a noisy environment. By clicking the power button twice, you can activate the noise-cancellation feature Specifications: Signal transmission: 2.4GHz Directivity: omnidirectional Frequency Response: 20Hz-16kHz SNR: 77dB Sensitivity: -42dB Sampling rate: 48kHz Bit depth: 16bit Transmission distance: 50m (without obstacles) RF output power: 6dbm TX battery life: 10 hours Battery capacity: 95mAh Charging interface: USB-C TX: 52x17.5x16.1 mm RXU/RXD: 46x26.2x10mm TX: 8.5g RXU/RXD: 5g