16MB ESP32 Wireless Communication Module Small Card Development Board -2021. Feature: Hardware Specifications: Main chip: ESP32 Module: ESP32-WR0VER-B,SIH7000G Interface: USB,SD Card, Solar Input interface Flash Memory: 16M Flash / 8M PSRAM Button: Reset, Power switch USB to TTL: CH9102F Car Clock: 40HHz SIM Card Size: Nano SIM Card SIM Antenna Model: Full Band LTE Antenna 698-960 1710-2690MHz GPS Antenna Model: 1575R-AM Operating Temperature Range: -40~85 degrees Product Size: 111mm * 37mm * 20mm Product Weight: 40g Power Specifications: Working Voltage: 5v input Working Curent: 200mA Sleep Current: 1.2mA Charging Current: 780mA Battery Model: 18650 (Battery not includes) Battery Holder Model: 18650 battery holder JST Connector: SOLAR USB: TYPE-C 3.0 Wi-Fi: Standard: FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC Protocol: 802.11 b/g/n (802.11n, speed up to 150Mbps) A-MPDU and A-MSDU polymerization, support 0.4us Protection interval Frequency: Range 2.4GHz〜2.5GHz (2400M〜2483.5M) Transmit Power: 22dBm Communication distanc: 300m Bluetooth: Protocolmeet Bluetooth: v4.2BR/EDR and BLE standard Radio Frequency: with -97dBm sensitivity NZIF receiver Class-1, ClasS-2;Class-3 emitter AFH Audio Frequency: CVSD;SBC audio frequency Software Specification: Wi-Fi Mode: Station/SoftAP/SoftAP+Station/P2P Seciirity Mechanism: WPA/WPA2/WPA2-Enterprise/WPS Encryption Type: AES/RSA/ECC/SHA Firmware Upgrade: UART download/OTA (Through network/host to download and firmware) Software Development: Support cloud server development/SDK for user firmware development Networking Protocol: IPv4, IPv6, SSL, TCP/UDP/HTTP/FTP/MQTT User Configuration: AT + Instruction set, cloud server, android/iosapp OS: FreeRTOS Package includes: 1 x Wireless Communication Module; 2 x Pins; 1 x Ceramic antenna; 1 x LTE antenna; 1 x Battery cable