Malkoff MDC E2HTV3 EZP (Easy Programmable) Head. The Head fits 16650/E-Series (2CR123 sized) thread patterned bodies. This Head can be reprogrammed to use different combinations of the Low, Medium, and High light modes. The full output runtime on a 2000-2500mah 16650 battery is approximately 45min to 1 hour. The full output runtime on 2x CR123 is approximately 30-45 minutes. The LED is cool white with approximately 5700K CCT. The exact model of the LED is a trade secret. APPROXIMATE OUTPUTS AND DRAWS AT VARIOUS VOLTAGES VOLTAGE 3.7-4.2 Volts (16650)* 5.0-6.0v (2x CR123) LUMENS 8/80/1050-1200** 10/80/850 CANDELA high = 40K high = 33K MAH DRAW 10/85/2800 30/100/1400 *Below 3.6 volts the head will slowly taper in output. Low Voltage Protection (fast taper) doesn't start until 3 volts. Below 2.7 volts the flashlight will turn itself off. The use of an unprotected cell entails additional risks. **Actual highest output is dependent on the internal resistance of the battery. The use of an unprotected cell entails additional risks. Dimensions: Diameter: approximately 1.00 inch Length: approximately 1.53 inches Weight: approximately 1.1 oz This head was designed for rugged service from the ground up. It is fully potted to stand up to rough service and recoil. This item is Covered by Our Lifetime Warranty. The MDC E2HTV3 V3 EZP Head is constructed of 6061 T6 Aluminum and is HA Black Type III Hard Anodized. It is primarily designed for use with a single 16650 rechargeable Li-ion cell. We discourage the use of unprotected batteries for overall safety. This head does have low voltage protection (LVP). However, for maximum output, we also carry an unprotected, low internal resistance high discharge 16650 battery. Sold Here. The use of an unprotected cell entails additional risks. A charger for both batteries is sold Here. It will also work with 2x CR123 primary cells at a reduced output. This Head produces a focused beam that will reach out 200+ yards with good spill. The LED is 5700K Cool white. Mode of Operation for E2HTV3 EZP 3-Mode Head: The default programming is Low - Medium - High. MODE GROUPS L-M-H (default) L-H M-H H (only) H-M-L H-L H-M L-M M-L PROGRAMMING THE LIGHT (watch the video) The light is programmed using a series of short and long button presses. A short button press is a short momentary (<0.5 second) button press that DOES NOT latch/click the switch. A long button press is a long (>0.5 second) button press. In most cases latching the switch is not necessary. To enter Programming Mode perform 20 short button presses. It is not necessary to count or be exact. Simply perform short presses until the light begins to fast strobe. Hold the long button press. The light will fast strobe for approximately 5 seconds. After the strobe, the light will emit flashes at 2 second intervals. Count the number of flashes and release the button when the desired mode group (number of flashes) is reached. Releasing the the button during the fast strobe will reset to default (L-M-H). PROGRAMMING EXAMPLE To make your light single mode high only. Short press until the light starts strobing. Hold the press. Once the strobing stops - Release the button after the 4th flash. STAINLESS-STEEL BEZEL OPTION The stainless-steel(SS) bezels fit this head and any MDC head that uses an optic. If purchased from this screen, the stainless-steel bezel will be installed on the head. The original black-anodized aluminum bezel will be included. HT MDC SS Bezel sold HERE. This item is Covered by Our Lifetime Warranty. Made in the USA. Some parts not domestically sourced. Battery Warnings For Rechargeable Li-ion Batteries: - Do Not over-discharge/overcharge - Please recharge drained batteries ASAP - Do Not short circuit - Do Not dispose of in fire - Do Not expose to extreme heat or water - Please be familiar with the handling of rechargeable Lithium-ion batteries prior to their purchase Additional Battery Warnings: Lithium Primary and Li-ion Rechargeable Batteries are Inherently Volatile and Dangerous to Store and Use. All Lithium Batteries Introduce the Risk of Fire, Burns, and Explosions. You Assume the Responsibility of Educating Yourself About Their Use and Storage Before Purchase! If You are Uncomfortable With This, Do Not Purchase this Light! The input voltage is 3.7 - 9 volts. Input voltages of more 9 volts may destroy this flashlight. The Flashlight is protected against reverse polarity. WARNING: This light is capable of causing eye damage at close range. Please use the light responsibly!!!