Review on 🎤 18W Waterproof Wireless Voice Amplifier Bluetooth Teacher Microphone - Portable Voice Enhancer Headset Mic, Rechargeable & Ideal for Classroom and Outdoor Use by Bryan Ramirez

We just purchased this speaker system in less than 2 weeks with a UHF wireless headset to replace our existing low cost wired PA system. My wife uses it mostly in class. In their opinion, this UHF headset works very well and the speaker volume is sufficient for a class of more than 30 students. (She doesn't have to scream anymore) Because it's wireless, the speaker can be placed elsewhere in the classroom, away from the headset. It can be used as a regular pair of speakers with any Bluetooth device. This speaker volume is designed more for a large room (I tried turning the volume down but it's still very loud). One thing I can't figure out is which batteries are used in the speaker and headset. (Like lithium battery? No penis effect. I.e. rechargeable at any time). If the battery fails, can we replace the battery? The only defect is the charging cable of the headset. The headset had issues with fully charging from day one. After some time of troubleshooting with my other similar cable, the headset finally has a solid red charging light until fully charged. We definitely need to get a replacement charging cable from the seller.