Type Optical Applications Ideal for applications like motor speed monitoring, position tracking in automation systems, and various microcomputerized control systems On-board modules ATIR0721DS - transmissive photointerrupter from Kingbright Key Features Slotted optical switch for precise motion detection, visible light cut-off design for enhanced ambient light immunity, high sensitivity, Click Snap feature, and more Interface GPIO Feature Click Snap,ClickID Compatibility mikroBUS™ Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V