1-1.2W 445nm yobresal build with copper heat sink with extension tube option. Extension tube is optional and makes it possible to use 18650's for longer peak and battery life. I will sell it with or without extension tube please let me know when you message me which option you are interested in. either way it will come with batterys and charger.Private message me with an offer if interested. Serious buyers with money and a paypal account please preferably in the US.