< - > With 2pcs Powerful 18V Li-ion battery. < - > 1 × Cordless Drill. < - >Do not throw the battery into fire. < - > Do not make the battery short-circuit. < - > Drive shaft/chuck: Chuck. < - > There are two gears on the top of the fuselage : 1st gear (low-speed gear) 2nd gear (high-speed gear).