Features: 1.This product is an Sx1276 chip based on ESP32 WIFI enhanced OLED, namely for LORa remote modem. 2.Onboard 32MB flash WiFi antenna, 0.96 inch blue OLED display screen. 3.It is with a frequency of 868-915MHz, high sensitivity over -148dbm, +20dBm output power, high reliability and long transmission distance. 4.Lithium battery charging circuit, CP2102 interface and USB serial chip. Perfectly support for Arduino development environment, and can be used for program inspection and product development, convenient and fast. 5.It supports for Sniffer software protocol analysis, Station, SoftAP and WiFi Direct modes. specification:Item Type: Module Operating Voltage: 3.3-7V Operating Temperature Range: -40 to 90C Data Rate: 150Mbps at 11n HT40, 72Mbps at 11n HT20, 54Mbps at 11g and 11Mbps at 11b Transmission Power: 19.5dBm at 11.5 dB, 16.5dBm at 11 g and 15.5dBm at 11 n Receiver Sensitivity: Up to -98dBm Product Size: Approx. 5.2x2.5x0.5cm/2x1x0.2in PackageList:2 x Development Boards2 x Antennas2 x Power Lines4 x Pins6 x Nuts2 x Spring Lines Note1. 868/915MHz antenna needs to be connected to IPEX interface (if the antenna is not connected, for LoRa chip may be damaged). 2. Lithium battery charging and discharging circuit, when the battery is full, the blue LED will stop working. Please pay attention to the anode and cathode of the battery when using, otherwise it will be damaged! 3. Touch signal input through the IO port touch screen, you need to add 100nF pull-down capacitor on the pin.