Works great, but I didn't read the description and wasn't aware of the alarm button. It is truly a trainer...lol. It works great and is chargeable, so there's no batteries. It is as described.

Helpful gift, I bought for my mother to help with posture. So far, it’s helping. Helping her remember to stand up straight. But it is a little tight around her arms, so I think it could be a little bigger for comfort.

so far it works good, feels great nice fit

Smart Posture Trainer And Corrector - Upper Back And Clavicle Support For Improved Posture