Features: Complete,small form factor(SFF)802.11 b/g/n/e/i(2.4GHz)WLAN plus BT4.2combo solution optimized for low-power,mobile consumer electronics,wearable andInternet of Things(IOT) devices. ESP32 integrates all WLAN and BT functionalityin a single package to support a low cost,layout-friendly implementation whileallowing flexibility for platform specific customization. Highly integrated solution withless than 10 external components. ESp32 integrates the transmit /receive RFfunctionality including the antenna swiches,RF balun,power amplifier,low noisereceive amplifier,filters,power management,and advanced calibratiom ciacuitriesthat allow the solution to dynamically adjust itself to adapt to externalcircuit implefections. 2.4 GHz Dual Core WLAN WiFi + Blue-tooth Module. Specifications: Material: ABS+Alloy Size: 25x18mm/0.98x0.7in Package Includes: 1X Development Board note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.