Frenqeuncy:433MHZ Operating voltage: 3.3V to 7V Operating temperature range: -40C to + 90C 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 Note: 1.Pin header no welding in default; 2.Please contact customer service about download or installation information before placing order. Flash Size : 8 MByte 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 Different batches will have different product appearance and printing words, which will not affect the use. Colour:As Shown Material:PCB Package Contents: 1 x ESP32 Board Kit Only the above package content, other products are not included. Note: Light reflection 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.