the main chip using for Lexin ESP32, Tensilica LX6 dual-core processor, clocked at 240MHz.     Computing power up to 600DMIPS, chip built-in 520 KB SRAM, 802.11 b / g / N HT40 Wi-Fi transceiver, baseband, protocol stack and LWIP, integrated dual-mode Bluetooth (traditional Bluetooth and BLE low power Bluetooth).     This product is based on the WIFI Kit 32 added SX1275 chip, 433MHz frequency,is about -139dBm high sensitivity, +20 dBm power output, High reliability, transmission distance (measured open area communication distance 2.8Km).     Onboard 32MByte Flash, lithium battery charging circuit and interface, CP2102 USB to serial chip.     Supports Sniffer, Station, softAP and Wi-Fi Direct modes.          size:5x2.5cm     Material:ABS     colour:Photo Color          Package Contents:     1 * Display Bluetooth WIFI Kit          Only the above package content, other products are not included.     Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.