This Bosch hammer drill is engineered for tough jobs, with next-gen convenience and CORE18V® power. The GSB18V-535CB15 18V EC Brushless Connected-Ready 1/2 In. Hammer Drill/Driver features Bluetooth® connectivity (which connects with an optional Connectivity Tool Module), linking the free Bosch Toolbox app on any connected device for enhanced tool control and feedback. The kit includes a next-gen CORE18V® 4 Ah Advanced Power Battery. It keeps the power and runtime, while losing the weight, with 21700 cell technology. The CORE18V® matches the power of the original two-layer 4 Ah battery with half the number of cells. It features the CoolPack 2.0 heat-management system and 100% compatibility with Bosch 18V tools and 18V Lithium-ion battery chargers. This hammer drill’s powerful EC Brushless motor delivers 535 In.-Lbs. of torque and 0-28,500 BPM. It has variable speed settings; one for high-speed (0-1,900 RPM) and one for high power (0-600 RPM). The cordless drill has KickBack Control to reduce the risk from sudden rotational torque reaction, a 20+1 precision clutch; an all-metal chuck that provides durability and a longer belt clip.