
Advanced Adjustable Medical Cardiology Stethoscope with Multiple Frequencies. Fine Tune Technology: Adjustable ring changes vibration membrane for clear audio across different frequencies. Lightweight Composite Design: Gold-plated copper and aluminum alloy chestpiece reduces weight by one-third. 24K Gold-Plated Process: Ensures the sound-collection cavity conveys sound clearly and accurately. Automatic Frequency Switch: Light pressure on head automatically switches between high and low frequencies. Flexible Silicone Tube: Soft, smooth, and resilient tube folds easily to fit medical garments. Ultra Comfort Earbuds: Ergonomic design insulates noise and ensures comfort during long-term wear. Hermetically Sealed Shaft: Revolving shaft design provides clear and sonorous sound effects.