The 22015 is a 150mm (L) x 18mm (W) Ruler manufactured by Mega. It has an electronic design featuring a five-digit LCD display that provides easy readability. The ruler also features five button operation and a transparent window that allows users to easily measure materials or other objects. It includes two separate end pieces, allowing for easy adjustment of measurement range and two metal contacts in the base for measuring properties other than length. The base also includes 4 rubber feet to keep the ruler stable while in use. The 22015 is powered by an included battery and comes with an instruction manual.