1. The sensor measures and filters the electrical activity of muscle output, providing 0-V voltage output for electromyogram (EMG) measurement. 2. This muscle activity detector is designed for use with single-chip microcomputers, enabling straightforward detection of muscle activity. It is compact and optimized for integration with microcontrollers. 3. The muscle signal sensor detects electromyographic signals to measure muscle activity, a method historically used in research applications. 4. Power supply voltage: minimum 3.5 V. 5. Note: This is a hobbyist-grade 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 dedicated microprocessor design. 9. Equipped with a 3.5 mm connector. 10. Pins are compatible with standard motherboards. 11. Electromyography-based muscle activity measurement has long been used in research. Advances in compact, high-performance microcontrollers and integrated circuits now enable EMG sensors to be applied in various control applications. 12. The sensor outputs filtered and rectified muscle electrical activity in volts; output magnitude corresponds to muscle activity level. Designed for easy 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.