Description: 【Material】: Made from ABS material, the Exhalation Trainer offers on the go respiratory training to enhance lung capacity and core strength 【Adjustable Weight System】: Breathing Exercise Device features 5 silicone weights (20-100g) for resistance, catering to beginners and advanced users targeting abs, pelvic floor, or facial muscles 【Smart Counter and Rechargeable】: This Breathing Trainer is designed with the counting function to track reps; rechargeable for eco friendly reuse 【Portable Design】: Suitable for most individuals, this Lung Exerciser can be used effortlessly whether you are sitting, lying down, or standing. 5cmx5cmx16cm/1.97inchx1.97inchx6.30inch 【Application】: This Lung Trainer is easy to store and carry, making it great for use at home, in the office, or while traveling without location constraints Specification: Material: ABS 5cmx5cmx16cm/1.97inchx1.97inchx6.30inch   Package Includes: 1 Breathing Trainer 1 Cable Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.