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The Power Breathe K3 describes itself as ‘the world’s first intelligent digital breathing trainer’. It is designed to increase breathing muscle strength and endurance to improve fitness and reduce breathlessness during high-intensity activity. Basically, it promises to improve your sporting performance by strengthening the muscles you use to suck in the big ones … and all by spending just a few minutes each day breathing into an automated mouthpiece. More
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POWERbreathe The World's No.1 Breathing Trainer
Repeated-Sprint Cycling Does Not Induce Respiratory Muscle Fatigue in Active Adults: Measurements from The Powerbreathe® Inspiratory Muscle Trainer
.com : POWERBREATHE Kinetic K3 Breathing Trainer (PBK3) : Sports & Outdoors
Wireless charging compatible case As these Acefast earbuds are truly wireless you don't have to bother with cumbersome cables anymore. The charging case is equipped with a 480mAh battery, which you can charge by simply placing it on a wireless charger. The advantage of a TW pair of earbuds is that you don't have to stop using your earphones while the case is charging. A USB-C cable can be used to charge these as well if you prefer.
ACEFAST TWS Wireless Clear Bluetooth Earphones with Digital Display
POWERbreathe The World's No.1 Breathing Trainer