1、WIDELY COMPATIBLE: Suitable for 10oz/300ml various hard adhesives, and 20oz/600ml various soft adhesives, large capacity cordless caulking gun is suitable for acrylic, adhesives, CH3-CH2-CH2-CH2- sealant caulking materials, making it capable of meeting a wide range of everyday caulking, filling, and sealing needs 2、ELECTRONIC PREVENT DRIP FEATURE: Caulking gun is equipped with a user friendly prevent drip function. When you release the trigger, will automatically retract the plunger that preventing messy drips or spills from dripping out. This eliminates the hassle of wiping up, and also allows for faster and better caulking results 3、STEPLESS SPEED REGULATION: This 21V electric caulking gun with a stepless speed control knob, provides accurate control over caulk flowrate and dispensing speed. From delicate manual caulking to covering larger floor gaps, electric caulk adhesive gun excels in efficiency and versatility 4、FLUENT AND EFFICIENT DISPENSING: 20000-22000/min of 550 high performance motor, with a maximum thrust of 2646N/270kg and cooperating with the quality expandable spring, the cartridge caulking gun ensures fluent adhesive flows without clogging. The aluminium alloy body further contributes to comfortable operating, even longtime caulking work will not cause arm fatigue 5、LONG LASTING BATTERY ENDURANCE: Equipped with a 2000mAh large capacity battery(1 main and 1 spare) and a fast charger, this battery powered caulking gun can work continuously for up to 5 hours under no load conditions and up to 4 hours under load. And the ergonomic handle ensures labor saving operating, support comfortable grip, and less hand fatigue Item Type: Cordless Caulk Gun Working Range: For 300ml various hard adhesives; 600ml various soft adhesives Motor: 550 High performance motor Motor Power: 45W Motor Speed: 20000-22000/min Battery: 2 x 21V 2000mAh rechargeable li ion batteries Color: Silver black 1 x Li Ion Powered Caulking Gun 2 x Batteries 1 x Supply Adapter 1 x Piston 1 x Nut 1 x Nozzle 1 x Storage Box