Supports up to 80 voices, with each voice lasting up to 1500 ms (one or two words). Up to 7 voices can be recognized simultaneously. Any sound can be trained as a voice command. The module must be trained before it can recognize voices. Power: 4.5 to 5.5 V, typical current 40 mA. Digital interface: UART interface and 5 V TTL level for GPIO. Analog interface: 3.5 mm mono microphone connector plus microphone pin interface. Recognition accuracy: 99%. Compact design that is easy to integrate into small DIY projects such as robotics, home devices, and interactive toys. Complete kit includes 1 Voice Recognition Module and 1 compatible microphone, providing the core components to begin training and implementing voice commands in your project. Use scenarios: Robotics: control a small robot or actuator via custom voice commands. Smart home devices: trigger actions like turning on lights or starting a scene with a trained command. Interactive toys: enable voiceactivated features and responsive play experiences.