All FENIX flashlights feature innovative design and impressive features combined with quality construction and excellent value,
Fenix TK21 adopting the latest American Cree XM-L LED, TK21 is the first high intensity and compact outdoor flashlight using XM LED with the side ode switch button. Fenix TK series flashlights feature a powerful, tough and waterproof to IPX-8 Standard design, which is suitable for various outdoor environments. Powered by two CR123A batteries (Lithium) or one 18650 Rechargeable batteries (Li-ion), with multiple brightness levels, the light makes a perfect combination of the extremely high intensity and ultra long runtime. Therefore, TK21 must be your reliable partner when searching, rescuing, etc.

Dimensions
Length: 150mm
Diameter: 25.4mm
Head (Bezel): 40mm
Weight: 152.6-grams (excluding batteries)

Notice: The below-mentioned parameters (tested in lab using quality CR123A primary lithium batteries) are approximate and may vary between flashlights, batteries, and environments.

6 Features which make Fenix stand out from other flashlights on the market

1st Feature - Advanced Technology:
Through extensive development, an exceptional optic was produced with the perfect mix of throw and spill without any bothersome beam artifacts or shadows. A constant current regulation circuit, which keeps the flashlights in constant brightness regulation. Unlike traditional flashlights output will not dim over the life of the battery.

2nd Feature - Efficiency:
Fenix pursues the highest electricity efficiency, makes the limited electric power coming out more functions. Fenix uses the optic ultra clear glass lens, makes sure the efficient light shoot.

3rd Feature - Practical Function:
Digitally controlled constant current multilevel outputs, such as different brightness adjustment, strobe mode and SOS mode, which can satisfy customers' different illuminating requirements.

4th Feature - High Reliability:
Fenix uses the top quality LED of the world, which has a very long life. Fenix flashlights implement effective and efficient heatsinks to protect the LED from overheating while keeping the LED efficient with its power consumption. Fenix products' configuration is designed to be firm and durable. Fenix products' glass lenses are anodized finish, not easy to be scratched, and have the function of anti-shock. Fenix can be waterproof to IPX-8 standard. Fenix is Type III Hard anodized finish, which makes it durable.

5th Feature - Innovation:
Fenix products are always more excellent than others'. We keep innovation. The L1P is the first mass-produced highly bright AA flashlight in the world. It was voted as "The 2005 Flashlight of The Year". L0P is the first mass-produced highly bright AAA flashlight.  Then, here comes L0D. We make together small size, high brightness and long working time. L2 series is the brightest 2AA flashlight with smallest size in the world. P1, called Pocket Rocket, is the brightest keychain flashlight. P1D is updated with higher brightness and more output levels. Fenix was the first one to mass-produce Cree 7090 XR-E and Luxeon Rebel LED flashlights. E0, using one AAA battery, can keep on working for 20 hours with practical brightness, and can be waterproof to 100 foot. P3D keeps the record of the world's brightest mid-mini size flashlight.

6th Feature - Continuing Improvement:
We pursue high reliability and perfection in details. We believe "No best, but better". We stick to highest optic and circuit efficiency. We pay attention to customers' experiencing. We have lots of test before our products come out and we collect customers' feedbacks after our products come to the market. In fact, every model will be improved for several times. We are thinking and making progress...