?Rechargable Li-on Battery?BoomX-D1 wireless lapel mic built-in rechargeable battery and standby time up to 5 hrs with full-charging. Wireless range up to 164 feet (164ft in Open Area, 65ft in area with obstacle). ?TFT Screen Display?BoomX-D1 wireless microphone adopt TFT screen for the manufacturing,all the font and icon on the screen are crystal clear.With TFT screen display function,you can monitor signal dynamic bar,battery use condition etc. ?Real-time Audio Monitoring?With the Real-time Monitoring Function, you can test whether it is working normally during recording to make sure the smooth recording. ?Internal/ External Lapel Mic?Comica BoomX-D1 wireless lapel microphone comes with a lav mic and internal mic as input modes for you to choose. ?2.4G Wireless Mic System?Comica BoomX-D1 wireless microphone adopts advanced 2.4G wireless technology, it can automatically adjust the frequency when frequency are disturbed and brings you very good anti-interference effect.Wide used for YouTube Facebook livestream,Vlog Recording,Interview,Wedding,Church etc.