Compact and Lightweight: This breathing trainer is designed with silicone and ABS materials, ensuring durability while remaining lightweight and portable. Its compact size makes it easy to carry, perfect for on-the-go training sessions at home or outdoors. Adjustable Resistance Control: Featuring a user-friendly adjustable resistance knob, this lung trainer allows you to customize the intensity of breathing resistance by simply rotating the valve. Tailor your training experience by increasing or decreasing the resistance level as needed for optimal results. Respiratory Muscle Strengthening: Enhance your endurance and breathing capacity with this portable lung exerciser. By targeting respiratory muscle groups and expanding the diaphragm, this trainer helps improve overall respiratory function, making it an essential tool for fitness enthusiasts looking to boost their performance. Versatile Lanyard Design: The built-in lanyard design adds convenience to your workout routine, allowing you to use the breathing trainer in various sports activities without needing both hands. Whether you're engaging in high-intensity training or outdoor sports, this versatile feature ensures easy accessibility. Performance Enhancement: Ideal for fitness experts and enthusiasts alike, this breathing trainer is a valuable addition to any workout regimen. Incorporate it into your daily exercise routine to strengthen respiratory and abdominal muscles, enhance endurance, and unlock your peak athletic performance. Description: Improve your respiratory endurance and enhance your fitness routine with this portable breathing trainer. Compact and lightweight, it is perfect for on-the-go use or at-home training. The adjustable resistance knob allows you to customize the intensity of your breathing exercises, helping you strengthen your respiratory muscles and expand your diaphragm. With a built-in lanyard design, it can be easily used during various sports activities without needing both hands. Ideal for fitness enthusiasts, this trainer is suitable for high-intensity workouts like running, swimming, cycling, martial arts, and outdoor sports. Make this breathing trainer a valuable addition to your daily exercise regimen and experience the transformation in your fitness journey. Item Name: Breathing Trainer Material: Silicone/ABS Features: Men Women Universal, Portable Size, Workout Equipment Size Details: 8cm x 3.3cm(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Breathing Trainer 1 x Lanyard