The Streamlight ProTac 2.0 flashlight delivers a maximum light output of 2000 lumens with three programmable brightness levels and multiple operating modes. Constructed from durable 6000-series aircraft aluminum with a MIL-Spec Type II anodized finish, this professional flashlight measures 15.5 cm in length and weighs 234 grams with the included SL-B50 lithium-ion battery. The IP67-rated waterproof design ensures complete dust protection and water resistance up to 1 meter deep for 30 minutes, while the rugged construction withstands drops from 2 meters. The TEN-TAP programming allows for selection among three operating configurations: High/Strobe/Low, High only, or Low/Medium/High, providing versatile lighting solutions for various tactical and professional applications. The flashlight enables one-handed operation with momentary and constant-on modes, an anti-roll head design to prevent movement on flat surfaces, and a sliding sleeve that protects the USB-C charging port. The included SL-B50 rechargeable battery offers up to 2.25 hours of continuous runtime in High mode (2000 lumens), with extended runtime in Medium mode (570 lumens) and Low mode (100 lumens). The beam distances are 262 meters in High mode, 142 meters in Medium mode, and 60 meters in Low mode, providing reliable illumination for demanding environments. The complete package includes the flashlight, a removable pocket clip, a nylon holster for secure transport, and a USB-C charging cable that supports both internal and external battery charging. This tactical lighting device is designed for professional users who require reliable performance under challenging conditions, with the rechargeable battery system eliminating the need for disposable batteries while maintaining consistent high-performance lighting.