Features: 1.Complies with the Bluetooth v4.2BR / EDR and BLE standards protocol. 2.Equipped with RF NZIF receiver Class-1, Class-2 and Class-3 transmitter AFH with -98dBm sensitivity. 3.Support audio for CVSD and for SBC Audio, providing ultra clear HD sound. 4.Support integrated external memory card slot. 5.Support Buletooth and WiFi functions with outstanding performance. specification: Complies with the Bluetooth v4.2BR / EDR and BLE standards protocol. Equipped with RF NZIF receiver Class-1, Class-2 and Class-3 transmitter AFH with -98dBm sensitivity. Support audio for CVSD and for SBC Audio, providing ultra clear HD sound. Support integrated external memory card slot. Support Buletooth and WiFi functions with outstanding performance. s: Size: Approx. 69.13*28.41*8.45mm/2.72*1.12*0.33inch < Hardware s Chipset ESPRESSIF-ESP32-DOWDQ6 240MHz Xtensa single-/dual-core 32-bit LX6 microprocessor FLASH QSPI flash/for SRAM, up to 4 x 16 MB for SRAM 520 kB for SRAM + 8MBytes External for SPRAM KEY reset dispaly IPS Panel ST7789/1.3 Inch Power indicator lamp red USB to TTL CP2104 Camera OV2640 2Megapixel on-board clock 40MHz crystal oscillator working voltage 2.3V-3.6V working current about 160mA working temperature range -40 ~ +85 size 69.13*28.41*8.45mm Mic MSM261S4030H0 Memory Card Integrated external Memory card slot Power management Chip IP5306 Power Supply USB 5V/1A charging current 1A battery 3.7V lithium battery WIFI Description Standard for FCC/CE/TELEC/KCC/SRRC/NCC protocol 802.11 b/g/n/e/i (802.11n, speed up to150Mbps)A-MPDU and A-MSDU polymerization, support 0.4S Protection interval frequency range 2.4GHz~2.5GHz(2400M~2483.5M) Transmit Power 22dBm communication distance 300m Bluetooth Description protocol meet bluetooth v4.2BR/EDR and BLE standard radio frequency with -98dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH audio frequency CVSD&for SBC audio frequency Software Description wifi Mode Station/SoftAP/SoftAP+Station/P2P security mechanism WPA/WPA2/WPA2-Enterprise/WPS Encryption Type for AES/RSA/ECC/SHA firmware upgrade for UART download/OTAThrough network/host to download and write firmware Software Development Support cloud server development /SDK for user firmware development networking protocol for IPv4, for IPv6, for SSL, for TCP/UDP/HTTP/FTP/MQTT User Configuration AT + Instruction set, cloud server, for android/iOS app OS for FreeRT OS Package List: 1 * Camera Module 1 * Power Cable