Using instructions: 1st, insert the blue handle into tray breath hole, then put into container. 2nd, put hot water (about 70-80 degree c) into container till the tray is submerged. 3rd, keep the tray in water for about 15-25 seconds, then take out the tray using the insert handle. 4th, gently shake off the excess water and insert the mouth tray into mouth. Adjust the tray to a comfortable position and then bite on, using your fingers to the tray around the front and sides to Make a good mold of your teeth and gum shape. 5th, remove the tray, after you feel that all your teeth have left good impressions on it. 6th, put the shaped tray into cool water to fix your anti snore tray, and take out the insert handle. The anti snore tray was made of food grade eva material, which can mold and remold , so if you Not satisfy with the shaped tray, you can repeat the above steps to mold one as you wish to have. 1) 48pcs/carton (37*28*13cm) 2) 200pcs/carton( 46*46*26cm)