LungBoost Electronic Smart Lung Exerciser - Lung Strengthener for Improving Lung Capacity - Replacement for Breathing Bag - Breathing Device to Strengthen Lungs - Lung Exercises Machine 1. EASY TO USE: Our lung exerciser device has simple to use electronic technology and makes lung capacity training and elevation training a breeze ; it also imitates a breathing bag for diving or instrument training 2. EASY TO READ: The Lung Boost breathe trainer is a good replacement for a high elevation training has a large screen display with incentive driven visuals making training interesting and fun 3. MULTIPLE TRAINING MODES: Our breathing exerciser has two training modes , endurance and strength , making your lung training sessions more effective 4. REMOVABLE MOUTH PIECE: Our smart lung training machine is built with a removable mouth piece design for easy cleaning and interchangeability It can strengthen muscles that help in respiration and can help you elevate your breathing to an easier level for an enhanced performance especially in athletics. This device uses dual purpose training - Low Intensity Endurance Aerobic Training and High Intensity .Anaerobic Interval Training, while strengthening your inspiration (inhalation) and expiration (exhalation) muscles. LungBoost is ready to use with 5 resistance levels. Each resistance level can be adjusted to 5 positions. Train at your most comfortable level with 30 possible settings. Specification Display: TN Function Modes: Endurance/Strength/Memory Mode Dimension: 161 x 61 x 117mm(6.3 x 2.4 x 4.6in) Weight: 170g/0.4lb (without batteries) Two AA 1.5V alkaline batteries, continuously operated as long as 300 hours. Package Contents 1 * Respiratory Trainer 1 * Breathing Tube 5 * Resistance Cones 1 * User Manual For all home care products(not including accessories) you purchase from Homecarewholesale.com, get worry-free 1 year warranty and friendly 24 hours customer service. Enjoy your shopping freely at Homecarewholesale!