The DEWALT 20-Volt Max Drill/Driver kit (DCD771C2) is designed with a high-performance motor that delivers 300 unit Watt out (UWO) of power. This compact, lightweight design can tackle a wide range of applications and features a 2-speed transmission and single sleeve ratcheting chuck. Backed by DEWALT's 3-year limited warranty, this versatile drill/driver comes complete with 2 lithium-ion batteries, charger and sturdy carrying case. The DCB240 20-Volt MAX 4 Ah compact lithium-ion battery provides the highest capacity within the DEWALT 20-Volt MAX compact battery lineup. Using state-of-the-art lithium-ion technology, the DCB240 delivers up to 1/3rd more run time while maintaining the same size and weight as the DCB230 20-Volt MAX 3 Ah compact battery. The DEWALT DCF887B Impact Driver is ideal for most fastening applications. This driver features a DEWALT built brushless motor that deliver more run time and capacity over standard units.