Shell color: Black.<br />Light color: Green，Blue，Red.<br />Material: Metal.<br />Size: Approx. 16 * 1.4 * 1.4cm/ 6.3 * 0.55 * 0.55 inch (L*W*H).<br />Powered by two AAA batteries.<br />Output wavelength: 405 nm.<br />Voltage: DC 3V.<br />Not need to preheat.<br />Working temperature: 20 to 30 degrees Celsius.<br />Storing temperature: 10 to 40 degrees Celsius.<br /><br />Package Including<br />1 * Black Laser Pointer Pen