Specification: Specfication: FLASH: QSPI 4MB Flash 8MB PSRAM SRAM : 520 kB SRAM KEY: reset,BOOT Switch: BAT switch Power indicator lamp: red USB to TTL: CP2104 Modular interface: SD card, UART, SPI, SDIO, I2C, LED PWM, TV PWM, I2S, IRGPIO, capacitor touchsensor, ADC, DACLNA pre-amplifier on-board clock: 40MHz crystal oscillator Working voltage: 2.3V-3.6V Working current: about 40mA Sleep current: 1mA Working temperature range: -40- 85 degC Size: 91.10mm x 32.75mm x 19.90mm Power Supply Specifications: Power Supply: USB 5V1A Charging current: 1000mA Battery: 3.7V battery Wi-Fi: Description Standard: FCCCETELECKCCSRRCNCC Protocol: 802.11 bgnei 802.11n,speed up to150MbpsA-MPDU and A-MSDU polymerization,support 0.4S Protection interval Frequency range: 2.4GHz2.5GHz2400M2483.5M Transmit Power: 22dBm Communication distance: 300m Bluetooth: Description Protocol: meet bluetooth v4.2BREDR and BLE standard Radio frequency: with -98dBm sensitivity NZIF receiver Class-1,Class-2Class-3 emitter AFH Audio frequency: CVSDSBC audio frequency Type:Bluetooth , WIFI Compatible Audio Video Equipment Style:Player Model Number:--- Weight:55 Dimensions WxHxD:--- Bundle:Bundle 1 Package:Yes Package List: 1 x WiFi Bluetooth Module 2 x Pins