Here is the Green Lion Digital Display Mic, a perfect tool to provide high-quality audio and effortless recording. This product features 2.4GHz digital frequency, 20m range support, 7-hour battery life (21 hours with the charging case), and 360° pickup for the best performance. Its package includes 2 mics and 1 receiver. With Green Lion Microphone captures sound like never before. Specification 100mAh (Transmitter) 800mAh(Charging Case) Battery capacity  2.4Ghz Digital Frequency  20Hz-20kHz Frequency Response Up To 20m Transmission Range  2x Microphones 1x Receiver  48kHz Sampling Frequency  Up To 7h Working Duration  21 Hrs with Charging Case