1. The sensor measures and filters the electrical activity of muscle output, providing a voltage signal used to detect electromyography (EMG). 2. This muscle activity detector is designed for use with single-chip microcomputers, enabling easy detection of muscle activity. It is compact and optimized for integration with microcontrollers. 3. The muscle signal sensor detects electromyography (EMG) to measure muscle activity, a method traditionally used in research applications. 4. Power supply voltage: minimum 3.5 V. 5. Note: This is a hobbyist module, not a certified medical device; accuracy is not guaranteed. 6. Cable length: 94 cm. 7. Board dimensions: 2.5 cm × 2.5 cm. 8. Features a specialized microprocessor design. 9. Includes a 3.5 mm connector. 10. Pins are compatible with standard motherboards. 11. Electromyography (EMG) measurement has historically been used in research. With advancements in smaller yet more powerful microcontrollers and integrated circuits, EMG sensors can now be applied in various control applications. 12. The sensor outputs a filtered and rectified voltage signal proportional to muscle activity, ranging from 0 V upward. Output magnitude varies with muscle activation level. Designed for straightforward integration with controllers. 13. Color: As shown. 14. Material: Plastic. 15. Package contents: - 1 × Muscle sensor board - 1 × Professional cable - 3 × Disposable surface electrode pads 16. Note: Lighting conditions and display settings may cause slight color variation between the image and the actual product. Measurement tolerance: ±1–3 cm.