The Micro-Lux Dragon is one of the smallest most powerful single LED, single battery 10440 (AAA) sized flashlight that we know of in commercial production today and like all the TnC products is superbly finished and built like a bank vault solid and dependable. The Micro-Lux Dragon uses the new XPL-HI LED and a custom designed optic. The torch has a three level output with a memory mode. The Micro-Lux Dragon has great throw for such a small pocket/keyring unit. They are offered in a variety of metals listed on this page below. The unit produces about a 1,000 lumens on the high setting with a smooth on/off twist head operation. The maximum power is produced from an IMR 10440, but a standard 10440 will also work, these torches will not work with an alkaline AAA 1.5 volt battery. The settings are as follows: High-100%: Medium-30%: Low-5%. The unit will step down to a lower setting when the battery needs to be recharged and has a memory mode. The flashlight has a length of about 3.1 inches and a head diameter of 0.73 inches, the body diameter is 0.615 inch. A halfmoon and pocket clip will be an option. The approximate weight with the battery is from 1.1 oz. to 2.1 oz. this depends in your choice of metal. Price does not include batteries or a charger, and must be purchased separately.