H ELTEC AUTOMATION WIFI ESP32 Development Board 0.96 Inch Blue OLED Display Bluetooth Internet of Things for Arduino Frenqeuncy:433MHZ Operating voltage: 3.3V to 7V Operating temperature range: -40 Celsius to + 90 Celsius Data rate: 150 Mbps @ 11n HT40,72 Mbps @ 11n HT20,54 Mbps @ 11g, 11 Mbps @ 11b Transmit power: 19.5 dBm @ 11b, 16.5 dBm @ 11g, 15.5 dBm @ 11n Flash Size : 32MByte Lithium battery interface:2Pin-1.25mm interface Receiver sensitivity up to - 98 dBm UDP continues to throughput by 135 Mbps Supports Sniffer, Station, softAP and Wi-Fi Direct modes Colour: white + black Material: PCB + metal Size: 50x25.4x10.3mm Package Contents: 1 * Development board 2 * Headers 1 * Pin sticker 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.