потребление v4.0 + edr bluetooth мотоциклетный шлем интерком гарнитура low power earbuts rider 4.1 автоматический ответ на наушники

product description: *1.this helmet bluetooth headset is designed by the designer and according to the internal structure of the motorcycle helmet full face helmet and half helmet. *2.it uses csrs latest 4.1+edr bluetooth technology, superior signal transmission, ultra low power consumption, and all bluetooth devices. support automatic answering function, no need to answer the phone manually when calling, safe and fast. *3.support up and down song, volume addition and subtraction, playback pa