Specification: _x005f_x000D_ ESP32 _x005f_x000D_ ESP-WROOM-32 integrates traditional Bluetooth-Compatible, low-power Bluetooth-Compatible, and Wi Fi, and has a wide range of applications: Wi Fi supports a wide range of communication connections and also supports direct connection to the Internet through routers; Bluetooth-Compatible allows users to connect to their phones or broadcast BLE Beacon for signal detection. The sleep current of the ESP32 chip is less than 5 μ A. Make it suitable for battery powered wearable electronic devices. The ESP-32 supports a data transmission rate of up to 150 Mbps, and after passing through a power amplifier, the output power can reach 22 dBm, enabling large-scale wireless communication. Therefore, this chip has industry-leading Advanced technical specifications, including performance in high integration, wireless transmission distance, power consumption, and network connectivity. _x005f_x000D_ _x005f_x000D_ ESP32S _x005f_x000D_ Module size: about 25.5 * 18.0 * 3.1mm/1.00 * 0.70 * 0.12inch _x005f_x000D_ Antenna form: default onboard antenna compatible with IPEX base _x005f_x000D_ Spectrum range: 2400-2483.5MHz _x005f_x000D_ Working environment: -40 ° C~85C _x005f_x000D_ Storage environment: -40 ° C~125 ° C,