Feature: 1. High Quality Materials: 32bit RISC core, operating frequency 240M, support DSP instruction set and FPU floating point arithmetic unit. 2. Support Calculation: Support up to 1024 points complex FFT IFFT calculation or 2048 points real FFT IFFT calculation. 3. Applicable Scenarios: Used in smart homes, all kinds of smart home appliances, 86 boxes, toys, lamps, industrial, Internet of Things, automobiles, security and lighting and other products that require voice control. 4. DIY Gifts: Very suitable for making gifts, cards and handicrafts for your own speech. 5. Versatile: It is very suitable for adding sound effects to models, photo frames and displays. Specification: Item Type: Voice Recognition Module Material: PCB Model: HLK-V20 Working Voltage: DC 5V (USB Power Supply) Audio Input and Output: Support 1 Analog Microphone Input Support Dual Channel Dac Output Support I2s Input Output Purpose: for Speech Recognition Applicable Scenarios: Used in Smart Homes, All Kinds of Smart Home Appliances, 86 Boxes, Toys, Lamps, Industrial, Internet of Things, Automobiles, Security and Lighting, and Other Products That Require Voice Control. Package List: 1 x Voice Recognition Module1 x Pin Header Note: Do not use it in an electrostatic environment, which may damage electronic components