Pixnor 3pcs Reusable LED Penlight with Pupil Gauge ( Warm White Light,Random Color) Pen color: Random color. LED color: Warm white. Penlight length: 13.5cm. Battery operated by AAA * 2 (NOT included). Diagnostic pocket clip activated nurse led healthcare penlight. Click and it holds, extra bright sealed concentric beam. Perfect for nurses, medical students, and home use