The original P20C2 series has been one of the best selling EagleTac models. The updated MKII Cree XM-L version has siginificant performance improvements. It offers an incredible 750 lumens with 550 ANSI lumens. P20C2 Mark II offers a new UI (user interface) that is perfect for profesionals and the general public. Specification * XM-L U2 Cool White * Three brightness levels, Strobe, SOS * *Led lumen: 750-510/110/10 * *ANSI FL-1 lumen: 550-380/86/8 * *Runtime: 1.2/10/100+ hrs * Battery: Two CR123A lithium batteries (not included) * Dimensions : * *Length: 5.1 inch (13cm) * *Body Diameter: 0.8 inch (21mm) * *Head Diameter: 1 inch (26mm) * Weight (excluding batteries):2.8 ounces (79grams)