Specifications: Product Mouth Diameter: 3.1cm / 1.22 HOW TO THE QUICK STEPS TO MAKE Step 1: Clean your lip pump with mild soap and water, and then wet the area around your mouth with moisturizer we recommend lightly exfoliating the lips and the surrounding area with a soft washcloth, or exfoliation brush This moisture is not necessary, but.. may help establish tighter suction, wish is key to a good result. Step2: Position your lip pump head over your lip area, compress the pump to expel air, then release Hold lightly in place, let your lips relax into the lip pump While the pump is compressed, pucker and wiggle your lips as far and.. deep into the lip pump as possible. Position your upper and lower lips between the middle platform. Step 3: you also begin suck short puffs of air out the lip pump, you should feel a gentle pulling; continue until solid suction is established and the lip pump is holding suction, but comfortable around your mouth The amount of time for leaving the. pump on varies per individual, so begin with 15-20 second increments. It is better to hold a gentle, but solid suction, than it is to create a hard suction. Hard suction is never necessary and it should not hurt. Step 4: If you lose suction, repeat with step 2 and 3.the time should not exceed 3-5 minutes .If your suction is not strong enough and the lip pump falls off your lips, repeat until you achieve the perfect suction The. major reason why the lip pump falls off is because your lips and the skin surrounding the lips are not pushed deeply enough into the mouth-piece and you did not create a good suction. Try again. Do not get discouraged. Practice makes better! Please note: with the practice, you will get more confident and comfortable; and achieve the naturally fuller, sexy and charming lips. THE IMPORTANT CAUTIONS 1: Gently suction only, never hard. 2: Should not exceed 5 minutes every time. 3:. Start slowly A few seconds at a time, check and repeat. 4: Hard suction or long time maybe easily lead to bruising 5: Stop using it and consult the doctor, if the lips are bruising seriously.