Hardware Specifications
1. Chipset: ESPRESSIF-ESP32 240MHz Xtensa single-/dual-core 32-bit LX6 microprocessor
2. FLASH: QSPI flash 4MB
3. SRAM: 520 kB SRAM
4. Button: Reset
5. USB to TTL: CP2104
6. Modular interface: UART, SPI, SDIO, I2C, LED PWM, TV PWM, I2S, IRGPIO, ADC, DACLNA pre-amplifier
7. Display: IPS ST7789V 1.14 Inch
8. Working voltage: 2.7V-4.2V
9. Working current: About 67MA
10. Sleep current: About 350uA
11. Working temperature range: -40 degree C~ +85 degree C
12. Size: 51.52x25.04x8.54mm
13. Weight: 7.81g

Power Supply Specifications
1. Power Supply: USB 5V/1A
2. Charging current: 500mA
3. Battery: 3.7V lithium battery
4. JST Connector: 2Pin 1.25mm
5. USB: Type-C

Wi-Fi
1. Standard: FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC esp32chip
2. Protocol: 802.11 b/g/n(802.11n, speed up to150Mbps)A-MPDU and A-MSDU polymerization, support 0.4uS Protection interval
3. Frequency range: 2.4GHz~2.5GHz(2400M~2483.5M)
4. Transmit Power: 22dBm
5. Communication distance: 300m

Bluetooth
1. Protocol: Meet bluetooth v4.2BR/EDR and BLE standard
2. Radio frequency: With -97dBm sensitivity NZIF receiver Class-1,Class-2&Class-3 emitter AFH
3. Audio frequency: CVSD&SBC audio frequency

Software specification
1. Wi-Fi Mode: Station/SoftAP/SoftAP+Station/P2P
2. Security mechanism: WPA/WPA2/WPA2-Enterprise/WPS
3. Encryption Type: AES/RSA/ECC/SHA
4. Firmware upgrade: UART download/OTA (Through network/host to download and write firmware)
5. Software Development: Support cloud server development / SDK for user firmware development
6. Networking protocol: IPv4, IPv6, SSL, TCP, UDP, HTTP, FTP, MQTT
7. User Configuration: AT + Instruction set, cloud server, android/iOSapp
8. OS: FreeRTOS