The Micro-Lux like all the TnC products is superbly finished and built like a bank vault solid and dependable. These small N-cell sized (10280 Li-Ion) units use the new Rebel ES LED and are offered in a direct drive model and a regulated version. They are offered in HA Aluminum, Brass, Copper, Stainless Steel and Titanium. The direct drive unit produces about 275 lumens with a smooth on/off twist head operation. The regulated unit produces 150+ lumens and has a high/low mode with the same head twist operation. The regulated unit will shut off when the battery needs to be recharged. The direct drive unit gets dimmer when it needs to be recharged. The torch uses a AR coated glass lens and has a length of 2.5 inches and a head diameter of .740 inches, the tube diameter is .645 inch. A split ring is included so you can mount the flashlight on your keychain if you want. They range in weight with the battery from 0.9 oz to 2.1 oz. The battery and charger are extra.