Good to know- This Homdics Modulair calf massager has 4 compression settings - choose the one that feels best for your tired legs- It lasts up to 5 hours on one charge, giving you plenty of time to ease those achy calves- Choose from 5 intensity levels - crank it up for post-workout relief or bring it down to unwind gently- The soft-touch fabric and adjustable velcro strap hug your muscles nice and snug- It runs quietly so you can enjoy a relaxing evening- It's got a rechargable battery, so you won't need trailing cables while you use it