Surefire Custom E2dSpecs.1. Triple XP-L HI Warm White U4 7A2 3000~3500K2. Carclo 10507 Clear Narrow optic3. Astrolux S1 A17DD-L FET+1 Flashlight Driver Only for single li-ion battery.   (3672mA tailcap current measured with LG HG2 3000mAh unprotected cell)4. Noctigon DTP Copper mcpcb5. Custom copper Heatsink6. 0.5㎟ copper strand wire (AWG20)7. No waterproof8. 18mm bored body fits with unprotected 18650 battery.9. 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. Driver UIWhile off: - Fully click and release to turn the light on. It will go to the first mode or the last-used mode, depending on whether you enabled mode memory. While on: - Short tap: Do a short (less than 0.5s) half-press to go forward to the next mode. - Med tap: Do a medium (0.5s to 1.5s) half-press to go backward to the previous mode. - Long tap: Do a long (longer than 1.5s) half-press to reset to the first mode (if mode memory is turned off). - Or fully click and release to turn the light off. Hidden modes: - Go backward from moon to access the hidden modes. They are, in order: - Turbo (just like the regular turbo) - Tactical strobe (10 Hz) - Battery check / beacon mode (each blink represents about 25% of a full charge) 0 blinks: < 1% full (< 3.0V) 1 blink : 1% to 25% full (3.0V to 3.5V) 2 blinks: 25% to 50% full (3.5V to 3.8V) 3 blinks: 50% to 75% full (3.8V to 4.0V) 4 blinks: 75% to 100% full (4.0V to 4.2V) 5 blinks: > 100% full (> 4.2V) - Biking flasher (2-level stutter beacon, 1 Hz) Configuration options: - Short tap rapidly a bunch of times (15+ taps, or until the light stops turning on) to enter soft config mode. The way it works is the light will blink twice for each option, then pause for a bit before moving to the next option. Turn the light off between the two blinks to toggle that option. The available options are: - Mode group: 7 modes or 4 modes: Group 1: moon, low, med1, med2, high1, high2, turbo Group 2: low, med, high, turbo - Mode memory toggle - If CONFIG_STARS is defined, you can ground pin 3 of the MCU to enable mode memory instead of using config mode. This can often be done by soldering a star on the spring side of the driver, if your driver supports that. Otherwise, it's pretty easy to make a solder bridge from pin 3 (mode mem toggle) to pin 4 (ground). Or even just wedge a piece of metal between the two pins. Other details to note: - Low-voltage protection will progressively step down the output at about 2.8V, and the light will shut itself off when even the lowest level gets below 2.8V. - The default turbo step-down is 45 seconds. - When turbo steps down to high, a short tap will push it back up to turbo or a medium tap will step down further, even if you got to turbo by going backward from moon. The step-down effectively moves it from the "hidden" turbo back to the non-hidden turbo. - A short tap from any hidden mode will return to the lowest mode.- Current will be varied it's condition. Above output is measured by LG HG2 18650 battery- This light is for only single li-ion battery with unprotected cell.- LG HG2 or Sanyo NCR18650GA or Panasonic NCR18650PF etc.- Head is opend. No waterproof. If you want waterproof, use epoxy on head's thread.- Battery is not included.- Custom modified Mcclicky switch is included but not installed. - 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.