Note: 1. If you feel sore, please stop using it for one day._x000D_2. Please allow slight error due to manual measurement. Thanks for your understanding._x000D_3. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. specification: _x000D_Item Type: Jawline Exercise Ball_x000D_Material: Silicone_x000D_Size: As Shown in the Pictures_x000D_Applicable People: The face is too fat, the face is not contoured, and the facial muscles are sore._x000D__x000D_Operating Instructions: _x000D_Step 1: Put the jaw exerciser into boiling water for 20-24 seconds._x000D_Step 2: Cool down, and then put the jaw exerciser into your mouth._x000D_Step 3: Bite the center of the bite strip until the jaw trainer is in place._x000D_Step 4: Release the bite and bite again, a total of 15 repetitions._x000D_Step 5: Rest for 1 minute._x000D_Step 6: Repeat this cycle 3-4 times a day, and slowly increase the weight as you feel strong. Features: 1The jaw exerciser promotes facial training, and the zigzag line shape defines a slim face by eliminating excess fat in the neck and jaw area. 2The white strip chew can be taken out freely for easy cleaning, bring you convenience. 3Easy to use, just use it every day when reading, driving, cooking, fitness training or any other activities. 4Activate facial muscles through the tension stress of jaw exerciser, increase facial blood flow. 5Strengthen and shape your jaw line, improve double chin, keep using it to make you more confident. 6Made of high?quality food?grade silicone material, safe and eco?friendly, practical and durable. PackageList: 1 x Jaw Exercise Ball 1 x PP Box 1 x English Manual 1 x Lanyard