Dudao M1-B 2 in 1 Lavalier Microphone -Black

"Transmission delay:<25ms Working frequency:2.4g wireless link Charging interface: type-c charging port Body weight: 25g Sensitivity:-38DB Specified type: omnidirectional microphone Signal-to-noise ratio: 64DBM Transmission frequency band:2400mhz-2483mhz Wireless transmission:2.4G adaptive FM Charging time: about 1.5 hours Usage time:3-6 hours Battery capacity:microphone 45mah Working current:<12ma Shutdown current:<20ua With LNGTHING adapter."