Our jaw exerciser for men and women has been engineered to help you define the facial muscles in your jaw, chin and neck. A few minutes every other day of regular jaw exercise should help you in your goal of achieving a more chiselled jaw, tighter neck muscles and less double chin. How to use: 1.Rinse with soapy water, then soak in boiling water for 20-25 seconds before removing.2.Place a pair of mandibular exercise tablets between the two molars by hand after removal.3.The effect of training is obtained by squeezing and releasing the jaw trainer on both sides of the molars.N4.Do 3-5 groups every day, each group for about 2-3 minutes, can relieve skin aging. 5.Start at the beginner level and work your way up the time.