This laser pointer has the same adjustable laser as our standard which allows you to adjust the diamter of the red laser with a quick turn of the aperture In addition it features an off/switch which is perfect for any times where youll need your hands free Just press the on/off button to turn the laser on and press again to turn it off This is a great laser pointer for presenter medical practitioners and trainers Well engrave this at no charge making it perfect for a gift All of our laser pointers come with the batteries included