Zitrades Nurse Penlight Medical Reusable LED Pen light with Pupil Gauge White 2PCS (Blue/Purple-8) Diagnostic Zitrades pocket clip activated nurse led healthcare penlight. Click and it holds, extra bright sealed concentric beam. Long-life and reusable, easy to use and affordable. The pre-focused pinpoint lens directly illuminates eyes, ears and throat. Included replaceable AAA batteries, Penlight sise: 13.5cm (5.3")Length x 1.3cm(0.51")diameter, LED color: white and pen color: blue or purple.