Odd little device

i got this free from a points program so i wasn't expecting it to be great. overall it does what it says, it vibrates and heats. there are two small vibrating pods which if you line them up correctly can it lower and mid back at the same time but no idea how you'd go about using these on your shoulders. the vibrating part has two settings and turns off after about 20 minutes of use. the heating part heats up quickly but gets too hot very fast. there is no shut off for the heating part and only 1 setting. there are velcro straps which i guess are supposed to hold this to you as you aren't supposed to lie on or against it. but they're too short to go around your body - mine is pretty average sized so mostly their useless. if this is more than $50 it's not worth it.