powerful performance: offering a maximum torque of 480 lb/ft and speeds of up to 3,300 rpm, 1/2 inch impact bolter equipped with a powerful high-end brushless motor for maximum productivity. easily remove or tighten screws in seconds. the torque of 650 n.m and the two batteries significantly increase the value of this battery shock key. 8000mah battery and fast charger: impact wrench comes with two 4000mah lithium-ion batteries to extend the life of the impact key. the power indicator reminds you of the remaining battery power, and the included quick charger will fully charge the batteries in just 1-2 hours. this allows you to use this impact driver without fear of losing energy during work. 3 speed adjustable speed control and mode adjustment: the bottom switch of this cordless screwdriver can be set to three speeds to meet a variety of work needs. the more the trigger is pressed, the faster the anvil of the impact wrench rotates. activating the automatic stop function in reverse ensures that the nuts will not come off easily during disassembly. simply press the battery impact wrench and the drive square will perform a few turns before stopping automatically. ergonomic design: impact screwdriver weighs only 1.6 kg, with an ergonomic design and insulated soft handle, you will not feel fatigue even when you use the wireless shock for a long time, which is suitable for all beginners and arthritic users. in addition, the led lighting located on the front of the wireless shock key ensures a bright working environment. multifunctional impact wrench: the 2-in-1 design with hand drill and wrench allows you to tighten or loosen car wheel nuts, door or wall bolts, as well as for installing scaffolding. the battery impact wrench kit also comes with an impact sleeve, screw tip and bit to maximize impact gun power. in addition, this electric shock wrench comes with a sturdy suitcase for easy storage and transport.