Surefire Custom E2dSpecs.1. Triple Luxeon led, PC Abmer 591nm 396lm @ 2100mA2. Carclo 10507 Clear Narrow optic3. Kaidomain KD2 v2 2280mA linear circuit, 2.5~4.5v4. Tailcap current 79mA(low)-713(Med)-2236mA(High)5. Al mcpcb6. Custom brass Heatsink7. No waterproof8. 18mm bored body fits with unprotected 18650 battery. (Slight over bored)9. White coated body (I don't know what kind of coating, but I guess it is Cerakote coatings)10. This is not shock proof. I can not guarantee when lens is broken. Because E series head's lens is not found on market or any other OEM manufacturer.      Be careful when you use this. Also do not tight head with too much strength. Choose driver's mode options. For now 3 mode(L-M-H with no memory) is set.Tell me your favorite mode.- This light is for only single li-ion battery, Do not use two CR123 batteries.- Head is opened. No waterproof. If you want waterproof, use epoxy on head's thread.- Battery is not included.- Registered airmail is default option. I need up to 10 business day to ship it.- No returns or refunds. Only I can accept if light is not turn it on.- Send message if you have any questions.