This Bosch hammer drill is engineered for tough jobs, with next-gen convenience and CORE18 V power. The GSB18 V-535CB15 18 V EC Brushless Connected-Ready Compact Tough 1/2 In. hammer drill 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 CORE18 V Compact battery. It keeps the power and runtime, while losing the weight, with 21700 cell technology.