The Bosch cordless caulking gun is fully compatible with all Bosch Professional 18 V batteries Easy material flow control: 9-speed setting selection and variable speed trigger Fast operation even with highly viscous adhesives: 3.5 kN pushing force combined with a maximum (no-load) feed rate of 9 mm/s No dripping or overflowing material: the automatic reverse function of the piston rod reduces pressure when the trigger is released