[4 Gear Adjustable Speed]The caulking Tool has 4 gears of variable speed, the pushing speed can be adjusted from 0 to 196mm/min. The variable trigger can also control the flow rate, The corresponding flow rate can be according to different needs, which can better control the flow of glue. [Automatic Rebound Design]When you release the trigger, the toggle automatically rebound to prevent excess glue from dripping out. Anti-rebound technology saves even more time and effort. [Widely Use]Suitable for applying glass glue, caulking, sealant etc. This caulking Tool is suitable for all common 10oz/300ml sealants. Widely used for filling, sealing and repairing some narrow gaps in walls, , balcony doors and , shower/wash basin installations etc. [LED Light Design]With an 450LM LED light, provide light for use in other dark environments. No need to worry about power outages when using in the dark! [Battery Powered]--Cordless caulking Tool for 18V 21V lithium-ion batteries Easy to use even when there is no power supply outdoors, making it easy to work in tight spaces, on job sites, or outdoors as long as you bring batteries. Warm tip: this cordless caulking Tool does not include 21V batteries. Voltage:18V/20V Max Working Current: 1A LED Lumens:450LM Work Pressure:120kgs Material: Plastic Colour:As Shown Package Contents: 1 x Caulking Tool (No 21V Battery) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.