Features: * The ideal dental arch track、 moderate forces. * Without repeated visits. * Patients can take on and off by themselves. * Short treatment cycle and never rebounded. * Avoid the trouble and inconvenience causing by Arch wire training、    especially for man who cannot achieve Arch wire training. * No harm to the teeth and oral soft tissue.  Note: -Tooth orthodontic is a long process、 please be patient for the effect. -The product is made of medical plastic and there is a little plastic smell odor、 please rinse with saline or toothpaste before using.   Package included: 1 x Tooth orthodontic appliance trainer