Master mechanic, 4v, lithium-ion, cordless screwdriver, internal lithium-ion battery 1.3ah, 1/4″ hex drive with auto lock, 2 speed, reversible, variable 0-300 rpm, 0-600 rpm, led work light with independent on/off switch, flashlight in base, 3-5 hour usb charger, battery indication lights, rubber soft grip, pivoting handle locks to straight or 90 degrees, includes 8 bits: 2 each p1, 3 each p2 hex & 1 each s2.