We suggest that the power screwdriver needs to be charged every month to to protect the battery and extend the life of this screwdriver. 3 different position handle offers maximum flexi ability for a wide range of operating conditions : 100° as pistol grip, 140° for tighter workspace and 180° as straight screwdriver. Simple operated spindle lock for 3 positions enables manual use and provide easier control for efficient screw-driving. This cordless screwdriver is equipped with adjustable torque ring with 6 setting (torque output from 1 N.m to 4 N.m), enables you to find suitable torque for different projects and helps you avoid stripping screws and prevent overpowering of delicate fasteners. 31pcs bits set gives you convenient and practical screw-driving experience for various projects all over the house. You can assemble furniture, install blinds, and decorative a room-- all with only one powerful tool and rich accessories. After fully charged, up to 400pcs screws in specification M3.5*20mm(1/8”*13/16”) can be tightened or loosened continuously by using our portable electric screwdriver. الحالة جديد نوع المعدات معدات البناء