With MUS516P6 as its main control chip, the Xiaozhi voice module is a low-cost, low-power, and small-sized offline voice recognition module that can be quickly applied to smart home devices and small household appliances, 86 boxes, toys, lamps, and so on. Operating voltage: 3.3V-5.5V Load: output 3.3V; The external load must not exceed150MA Power supply and standby: 500MA/60MA Hardware: 10 IO ports / 1 uart / 5 ADC / 2 PWM / 1 I2S / 1 SPI / 1 Audio output: 1 MONO power amplifier output interface FLASH: 2M Speaker power: 8 1W Language: English Operating temperature: 0-80 Special Interface Description/Precautions BO and B1 are the basic firmware burning points The serial ports RXD and TXD can also be used as B2 and B3 are PWM ports Specification:with Case Color: As Shown Material: Plastic+Metal Package Contents: 1 x AI Xiaozhi English Voice Module 1 x cable 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.