Primacare DL-9325 reusable diagnostic LED penlights are simply the most affordable, high-quality, long-lasting, and energy-efficient LED Penlight that emits a nice white color light that does not burn patients' retinas or cause complaints. Its LED technology also guarantees very efficient battery consumption without compromising functionality. These penlights will keep working for months or even years, you'll find it hard to believe that they're disposable. It is made of lightweight premium moulded plastic and replaceable batteries included also. Use it to check your patients with IVs, great for nurses, doctors, EMTs, and all types of medical personnel. It's very long lasting and may very well be the last penlight you'll ever purchase.