Main control module:SU-03T Power supply interface:Type-C interface or pin header Power supply voltage:5V Power supply current: 500mA Output voltage:5V or 3.3V, 5V inside the chip to 3.3V, 3.3V external load does not exceed 150mA Pin voltage:3.3V Power consumption:average working current 60mA Speaker specifications:VCC5V 8ohm 3W Supported interfaces:UART/GPIO/ADC/PWM/SPI/12S/12C All GPIOs can be configured as external interrupt inputs and wake-up sources 1 standard SPI interface, high speed 30MHz 1 full-duplex UART maximum speed 3Mbps, serial port voltage 3.3V 1 12C master/slave controller maximum speed 400KHz 2 PWM outputs 1 12-bit SAR-ADC maximum 450Khz sampling rate 32-bit RISC core, running frequency 240M Support instruction set and FPU floating point unit accelerator: maximum support 1024-point complex /IFFT operation, or 2048-point real /IFFT operation Built-in high-speed , built-in 2MB FLASH built-in 2.4W, single-channel Class AB amplifier Built-in POR (Power on Reset), low voltage detection and watchdog Operating temperature:-20℃-70℃ Colour:Random Color(Color is random, accept designation) Material:PCB Package Contents: 1 * Voice Recognition Sensor Module Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.