Fangrui Product Details Enhanced Audio Quality: The For Ulanzi A100 Wireless Lavalier Microphone Ensures Crisp, Clear Audio Capture, Making It Ideal For Professional And Amateur Use. Real-time Monitoring: Monitor Your Audio As It Records With Real-time Feedback Directly To Your Device. For Ensuring Every Recording Session Delivers The Desired Audio Quality. Versatile Compatibility: Whether Youre Recording A Podcast, Interviewing, Or Capturing Live Events, The For Ulanzi A100s Compatibility With Various Devices Makes It A Versatile Choice For All Your Audio Needs. Sound Delay:30ms Signal To Noise Ratio:greater Than Equal 58db Mic Sensitivity:-38+2db Mic Directionality:omnidirectional Mic Sound Pressure Level:greater Than Equal 115 Db Spl Input Current:5v/1a Battery Transmitter:3.7v/70mah/0.259wh Receiver:3.7v/70mah/0.259wh Charging Compartment:3.7v/800mah/2.96wh Duration Of Use: Transmitter:approximately 5 Hours Receiver:approximately 4 Hours Charging Compartment:charge Two Transmitters At The Same Time Greater Than 2 T