The final form of Bluetooth microphone will be the stereo microphone that incorporates two inbuilt microphones picking up sound from the left and correct directions. For all twenty five speakers we tested, the average battery life was just a little under seventeen hrs. The Sony Ult Discipline seven wins https://www.bluetoothspeaker.top/bluetooth-speakers-colorful-sound-with-rgb-light-stereo-speaker-wireless-speaker-with-led-light/