Jobri Back Tone Adjustable Posture Trainer BP4000 Small

Jobri Back Tone helps you to develop the �muscle memory� for good posture. A small signaling unit - held between your shoulder blades and waist - emits a beep or vibration every time you slouch. Straighten up and the signal stops. Wear BackTone over your clothes just once or twice a day for 20 minutes and great result within a few weeks.