BOYA mini 2.4G Wireless Microphone System Phone Microphone Lapel Microphone AI Voice Changer Microphone Noise Cancellation 100M/ 328FT Transmission Range with Charging Case Replacement for Type-C Android Smartphone --Transmitter Transmission mode: 2.4G digital frequency band Polarity mode: Omdirectional Antenna Type: PIFA Operating distance: 100m(barrier-free) RF output power: <10dBm Distortion: <0.1% Frequency response: 20Hz-20kHz Sensitivity: -36dB Sampling rate: 48kHz Bit depth: 16bit SNR: >80dB Battery Capacity: 65mAh Working Time: about 6H Charging Time: about 1.5H Working Temperature: 0 ot 50 Size: 31x15x16.4mm Net Weight: 5g --Receiver Size: 23.2x22.4x10.1mm Net Weight: 2.5g --Charging Case Battery Capacity: 260mAh Charging Time 2H(5V 2A) Charging Interface: Type-C Working Temperature: 0 ot 50 Size: 67.4x48.4x22.5mm Net Weight: 29g