lilygo ttgo ESP 32-WROOMLAN8720A chip Ethernet Down Loader Board Programmable Downloader (T-Internet-POE )Features: brand new and high qualityWith ESPRESSIF-ESP32-WROOM-B, LAN8720A Ethernet chip, SI 3404 power management chip.for PoE mode A (powered by data pair) and PoE mode B (powered by backup pair) and auto MDIX, allowing the use of straight and crossover Ethernet cables.20 needle footprint with 3.3V power and 15 ESP32GPIO are available for your application.The compact 75mm by 40mm footprint is for 4 mounting holes of ordinary M2.5 or 4-40 screws.A small programming/USB serial console sub-module has been created so that the Inter-POE module can be easily programmed to meet the user's application needs.Specifications: Size: approx 70x52.3mm/2.75x2.05inMaterial:MetalPinnet-POEChipset: ESPRESSIF-ESP32-WROOM,LAN8720A Ethernet chip,SI3404 Power management chipFlash: 4MBPower Supply Input: Type-C USB 5VWorking voltage: 2.7V-3.6VMaximum output current: About 1.2ACharging current:500mAWi-Fi Standard:FCC/CE-RED/IC/TELEC/Kcc/SRRC/Ncc(esp32 chip)Protocol: 802.11 b/g/n(802.11n，speed up to150Mbps)A-MPDU and A-MSDU polymerization，support 0.4μS Protection intervalFrequency range: 2.4GHz~2.5GHz(2400M~2483.5M)Transmit Power: 22dBmCommunication distance: 300mBluetooth-compatible Protocol: Meet BT v4.2BR/EDR and BLEWi-Fi Mode: Station/SoftAP/SoftAP+Station/P2PSecurity mechanism: WPa/WPa2/WPa2-Enterprise/WPSPackage Includes: 1 X Double Row Pinnet-POE ESP32 DownloaderNote: the USB interface only has a charging function, the product needs downloader to programThe product does not have a Downloader Expansion Board default, Those who need a Downloader Expansion Board to be purchased separately