3.Our sleep position trainer SLP10 can monitor your sleep quality.After you use it,you may find you can get more time in deep sleep. 2.Our Sleep Position Trainer SLP10 is with white color,small size,light weight and it is comfortable to wear.The size for it is:83mm*83mm*43mm(3.2inch*3.2inch*1.6inch).The weight for it is 0.02 IB. 1.Our Sleep Position Trainer SLP10 can be worn on the forehead or sternum area to remind the user to adjust the sleeping position and train the snoring people to sleep in the appropriate position.which can improve the snoring symptoms caused by back sleep and improve the sleep quality.