The capacity of the built-in battery provided by the manufacturer is relatively small, and cannot satisfy the high-power situation of continuous long-duration square dancing.
Solution:
1-use the very popular 12V electric bicycle battery as the external battery;
2-use the micro-power FM transmitter to transmit signals at an effective distance of 100 meters, and the dancers will receive the signals on their FM Walkman, which will provide a much better sound quality than the Yunjie Audio products. The sound quality is much better than the products of "Yunjie Audio", and there is no worry about disturbing the public.