Dispenses Standard Cartridges or 20.3 Fl. Oz. Sausage Packs -Variable Speed Trigger Controls Flow of Sealant Complete with 12 Volt Battery, 3-5hr Charger and Molded Plastic Carrying Case. Cordless Caulking Gun operates on a 12 Volt DC Rechargeable Battery. The variable speed control is in the trigger for easy adjustments in speed. A longer shaft and barrel with a special plastic plunger disc for sausage pack applications. Barrels and shafts are easily changed out to switch from standard 10.3 fl. oz. (305 ml) cartridges to up to 20.3 fl. oz. (600 ml) sausage packs. It is ideal for glazing contractors, building contractors, roofers, cabinet makers, OEM fabricators, window manufacturers and installers, or anyone who applies a lot of sealants and wants an easier, more professional way of getting the job done, without the restrictions of cords or hoses.