The Nitecore i4000R tactical flashlight has an impressive maximum output of 4400 lumens from the 4 x Cree XP-L2 V6 LEDs and is powered by 1 x 21700 15A Li-ion battery. The torch comes with a Nitecore NL2150HPi rechargeable 21700 battery and a USB-C charging cable which plugs directly into the port under the rotatable protective cover at the tail end of the light.

Designed with tactical applications in mind, the i4000R has a 2nd generation Strobe Ready switch for fast and efficient access to the strobe function. This mode has randomly changing frequencies which can cause dizzying effects making it ideal for an emergency situation. The same switch that controls the Strobe Ready mode also provides momentary access to the turbo level. 

The i4000R comes with the Nitecore NTH20 tactical holster which is compatible with Molle systems. 

With safety and innovative always at the forefront of Nitecore's designs, the i4000R features an anti-impact reverse polarity protection, Advanced Temperature Regulation to maintain optimal performance, a power indication bytton so the user knows when it's time to recharge and mode memory for automatic access to the last used mode.

• Brightness Levels:
• Turbo: 4400 lumens - 30 mins runtime
• High: 1100 lumens - 2 hrs 15 mins runtime
• Mid: 330 lumens - 7 hrs 45 mins runtime
• Low: 50 lumens - 40 hrs runtime
• Ultralow: 2 lumens - 380 hrs runtime
• Plus Strobe mode (4400 lumens).
• Maximum beam distance 230 meters, waterproof to IP68 and resistant to impacts up to 1 meter.
• Length: 159 mm
• Head Diameter: 32.6 mm
• Tube Diameter: 25.4 mm
• Tail Diameter: 28 mm
• Weight: 135 g 
• Optical system combined with crystal coating and Precision Digital Optics Technology
• Dual tail switches enable intuitive operations for tactical applications
• Strobe Ready technology to enable quick access to strobe mode
• Intelligent li-ion battery charging circuit with a USB-C port
• Dual indicators are available to indicate battery power
• Indicators display battery voltage (±0.1V)
• Incorporated Advanced Temperature Regulation (ATR) module
• Optical lenses with double sided scratch resistant coating
• Constructed from aero grade aluminium alloy
• HA III military grade hard anodised finish
• Includes: Nitecore NL2150HPi 5000mAh 21700 li-ion battery, USB-C charging cable, clip, lanyard, spare o-ring, CR123 battery magazine, NTH20 tactical holster.