20V 4 Adjustable Speed Electric Caulk & Adhesive Gun Kit w/ 2.0 Rechargeable Battery & Charger, 10oz/300ml Silicone Gun for Filling, Sealing;4 gear speed selection buttons at the top of the caulking gun from 0 to 220mm/min, allowing it to control the flow of the adhesive more precisely. This caulking tool fits 10 oz. and 300 ml cartridges.Seesii caulk gun delivers 300KG Of push force to dispense adhesives and sealants. A lock-on side switch for continuous operation without having to hold down the button all the time. There is no automatic retracting function to avoid wasting unnecessary time.