THIS IS A KIT CONTAINING ALL PARTS TO BUILD THIS UNIT. THIS UNIT DOES NOT COME ASSEMBLED. You will need a soldering iron and basic electronics knowledge. OD 2+ Laser Safety Goggles are required to operate this product. (488nm range) Requires 1x 14500 3.7v button top, unprotected cell capable of at least 1A CONTINUOUS. (not included) Keep lens CLEAN! DO NOT BURN OBJECTS CLOSELY! Lens will collect soot and melt. No reverse polarity protection. (INSERTING BATTERY BACKWARDS WILL DAMAGE DRIVER) Continuous duty cycle. Focusable acrylic lens installed. Measures: 100mm x 21mm x 21mm Weight: 97g without battery, 117g with battery. Single mode driver. Stainless steel body. Lifetime warranty