There are 3 steps to use the venom extractor. Step 1 : Twist the pump, so that the neck extends up. Ensure that the correct sizing suction cup is covering over the wound. Step 2 : Grip the plunder with the hand pull the plunger to begin pumping. A vacuum suction would begin. Step 3 : This will cause a strong and firm suction over the lesion and will cause the skin to lift. This will drain out any excess fluid that remains. Many functions for your use: 1. Safe Travels On Hikes When you #39;re not using these kits at home, work, or in your car, you can take it on the go. Always be prepared and always be ready when you or someone faces the worst. 2. Expect The Unexpected Depending where you are located and what time of day, you always want to be prepared. Always carry survivalist essentials in the wildlife. 3. Great for Hiking and Camping This makes great for camping and hiking trips. Essential when traveling outdoors during walks in the nature. 4. EFFECTIVE Mosquito bites can often be treated successfully hours after a bite. Bites can irritate the skin, carry disease, or even carry poison that is harmful to the body. 5. EXTRACT FLUIDS FAST Retrieves Venom most effectively from extremities amp; areas of body outside muscle areas, effectiveness varies with the location of the bite. 6. EVERYDAY CARRY Quick Response to bites and stings. Four sizes of suction cups for precise effective suction on a variety of sting or bite size. Pump is easy to operate with one hand. 7. PREVENT INFECTION Prevent Irritation. When accident occurs, please deal with wound in correct way, prevent infection. Wipes and disinfecting pads included.