Features1Promote facial muscle training, reduce double chin and improve jawline appearance. 2Convenient cleaning, white bite strip can be removed freely, easy to use and no harm. 3Shaping sliming face by removing excess fat from the neck and facial jaw area. 4High quality food grade silicone, light and convenient to ensure safety and easy to use. 5Can be used when reading, driving, cooking, fitness training or any other activity.SpecificationCondition: 100% Brand NewItem Type: Jawline TrainerMaterial: Silicone Applicable Crowd: Face obese, face has no contour, face muscle achesSize: Approx. 3.5 x 3 x 3.8cm / 1.4 x 1.2 x 1.5inFunction:1. Make your jaw look strong2. Reduce the appearance of a double chin 3. Activate facial muscles through the jawline exercise ball4. Increase facial blood flow and oxygenation for a youthful appearance5. Improve the appearance of the jaw line without plastic surgeryOperating Instructions:Step 1: Place the jaw trainer in boiling water for 20-24 secondsStep 2: Cool, then place the jaw trainer in your mouthStep 3: Bite the center of the bar until the jaw trainer is comfortably in placeStep 4: Release the bite and bite again, repeat for 15 times Step 5: Take a 1-minute breakStep 6: Repeat this cycle 3-4 times a day, slowly increasing frequency as you feel strongNote: If you feel sore, take a day offPackage List1 x Jawline Trainer 1 x Lanyard