(without battery)【A cost-effective automatic sealing tool】 Filling seams can be a tedious task, but this affordable cordless seam-sealing gun makes the job easier to manage. Compared to manual guns, it only requires loading the sealant and pulling the trigger. We've saved you a lot of time and won't cause hand pain or cramps from repeatedly squeezing the manual seam-sealing gun.【Adjustable to 4 speeds】The silicone gun has a maximum dispensing force of 6500N, with fast and smooth extrusion without pulsation or pauses. Four speed settings allow you to easily control the flow and volume of adhesive, making it easy to apply perfectly consistent, smooth beads over extended periods. The 21V cordless drive-type sealant gun is perfect for all common 10-ounce/300ml sealant and adhesive tins.【Thoughtful anti-drip function】Our heat gun is equipped with a drip-free design, which is an excellent feature. When you release the trigger, it will automatically retract the piston to prevent any messy dripping or spillage. Tip: Before pulling the trigger, be sure to cut the nozzle off the tube and puncture the seal on the aluminum foil.【LED lights dispel the darkness】No more searching in the dark! There's an LED light on the nozzle of the sealant gun, making it convenient to work in low light. At the same time, there's a 3-color indicator light showing the remaining battery level, so you don't have to worry about sudden power outages while using it.【Reminder】Before filling the seams, use the needle-punched seal included inside the tube. Cut the tip/nozzle of the sealing tube. 3. Beginners are advised to start testing flow exercises at the lowest possible speed.