Description:  1. The main control chip using Le Xin ESP32, Tensilica LX6 dual core processor, clocked at 240MHz,  computing capacity of up to 600DMIPS, 520 SRAM, 802.11 KB chip b/g/n HT40 WiFi transceiver,  baseband, and LWIP protocol stack, Bluetooth (Bluetooth dual-mode integrated traditional and BLE low power Bluetooth).  2. Onboard 4M bytes (32M bit), Flash, and Wi-Fi antennas.  3. 0.96 inch White OLED display.  4. lithium battery charging circuit and interface.  5. CP2102 USB to serial chip, perfect support for  development environment.  ESP32 QFN package is a highly integrated chip, because of high frequency, small volume and not easy to heat dissipation, so Appeared when use high fever is normal, we complete the circuit had done to the stability of the evaluation, please rest assured use; If you have any worry, can increase the heat sink.  This product has built-in batteries.     Package included:  1 x ESP32 OLED V2.0 Kit ( ESP32 OLED V2.0*1, Board*1, DTH12*1, 3D print Shell*1,Cable*1, Line *1, Small heat sink *1, pin*2) 1 x USB Cable