The lamp for engineers and technicians. No matter whether you inspect the undercarriage of a car, replace a fuse or are an industrial worker - the LED Lenser P4 does a good job. The lamp can be attached to shirt or workwear as fast as lightning and weighs so little that you ll hardly notice it. However, you will notice its brilliant, super-bright light which you can focus by turning the lamp head. The P4 is operated with two standard, inexpensive AAA micro cells (Included).