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Features: 【2.4G Wireless Microphone System】This wireless microphone adopts 2.4G frequency band, features stable signal transmission and 50m effective range, not easy to be interfered, ideal for film & vlog recording, live streaming, interview, etc. 【Paired Transmitter & Receiver】2 Transmitters and 1 receiver have been paired, just turn them on, then the transmitter and receiver will automatically link to the frequency within 3s, plug and play, without tedious debugging. 【Dual Microphones Design】The transmitter has built-in microphone and supports omnidirectional pickup with clearer sound, also comes with an external lapel microphone, which allows users to record more flexibly. 【Built-in Rechargeable Battery】The transmitter and receiver both have built-in rechargeable battery that can be charged via the provided USB cables, and working time is up to 5H after fully charging. 【Real Time Monitoring】The receiver has real-time return monitoring interface, you can connect headphones to monitor the recording effect; backside clip design, can be fixed on collar easily and quickly. Specifications: Sensitivity: transmitter -38dB(+/-2dB); receiver -80dB Delay Time: 12.5ms Directivity: omnidirectional Sampling Rate: 48kHz 16bit Signal to Noise Ratio: 90dB Distortion: 0.5% at 1KHz Dynamic Range: 90dB Frequency Range: 2.4-2.483G Frequency Response: 20Hz-20KHz Effective Range: max.50M Working Voltage: 3.3-5V Working Current: max.100mA Charging Current: 400mAh Charging Time: about 2H Working Time: about 5H