Features: This module chip is the ESP32, which has the characteristics of scalability and adaptability.TwoCPU cores can be controlled separately. The clock frequency adjustment from 80MHz to 240MHz, and supports RTOS. It is a universal Wifi+BT+BLE MCU module. The Nodemcu-32s module integrates traditional Bluetoothcompatible, low-power Bluetoothcompatible, and WiFi. WiFi supports a wide communication connections as well as direct internet connection through routers; Bluetoothcompatible allows users to connect to their phones or broadcast BLE Beaconfor signal detection. The module supports a data transmission rate of up to 150Mbps and an antenna output power of 20dBm, enabling large-scale wireless communication. The operating system of ESP32 is FreeRTOSwith LwIP, and TLS1.2 with hardware acceleration function is also built-in. Specifications: Nodel: mcu-32s Chip: ESP32 2CPU Frequency:80Mhz-240Mhz Onboards: CH340 USB SerialPort LED Modules : ESP-32S/ESP-WROOM-32E/ESP WROOM-32UE/ESP WROVER-E/ESP WROVER-IE Feature: 36 GPIOs, each can be configured as PWM, I2C Size:approx 4.8x2.55cm/1.89x1in Note: Due to the different monitorsand light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviationdue to manual measurement. Package includes: 1PC ESP-32S/ESP-WROOM32E/ESP WROOM32UE/ESP WROVER-E/ESP WROVER-IE Development Board (Optional)