* * be careful + and -. if you put the wrong direction of the battery, the charging chip.
this product does not contain 18650 battery. * *
shipping list : ESP32 0.96 inch OLED+18650 battery shield
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Shenzhen Xin Yuan Electronic is a high-tech company with 10 years of design and R&D experience,specialized in the developing and manufacturing electronic products: development board, Wifi bluetooth module, such as ESP32, TTGO series module, etc.
Our company owns a number of independent research&development products and obtain unanimously approved customers, with powerful R&D team and marketing team.
Xin Yuan always provides customers with perfect after-sales service and technical assistance. High quality is our obligation,great service is our mission.
We can customize the items as per your request, welcome to customize products from us.