WHAT YOU RECEIVE IN THIS KIT. 3 X 3ML GEL SYRINGE MINT FLAVOUR STRONG FORMULATION.1 X Laser LED Light (Not contain battery) 1 X SET OF UPPER & LOWER MOUTH GUARDS FOR GEL. 1 X INSTRUCTIONS. HOW TO USE:Step 1: Making yourself filled trays. Heat the thermoform mouth tray under 80 hot water and warm it up about 10 seconds.Put the mouth tray over your teeth,use your fingers gently try till it mold your teeth,set the trays firmly against the teeth. Step 2: Compare the teeth used teeth shade guide. Step 3: Apply a thin layer of whitening gel to both mouth trays and spread evenly(0.25 to 0.4ml for each tray anymore is just wasted). Step 4: Insert mouth trays in the mouth and over the teeth,set the trays firmly against the teeth. Step 5: First the first time, insert the tray for 7-10 minutes,then rinse with water. Step 6: After teeth whitening,use mouth spray.It can make you fresh breath.Repeat this complete treatment 2 times (total time less than 20 mins for the first time), make sure you rinse & dry the tray between sessions. Step 7: Once per day, after 3 days,compare before and after with teeth shade guide,we can look teeth improved 7-10 shade. Repeat weekly after Step 7 to keep the shining bright smile!