The Walther Pro HL17 is a powerful head torch with a focusable beam that produces 405 lumens from the XP-G2 LED. The 28mm lens produces a beam up to 180m from the high-quality reflector. Using 3 x CR123A batteries with a maximum runtime of up to 9 hours, while using 3 x AAA batteries although the output is less - the runtime is increased to a maximum of 18 hours, this is a very powerful head torch yet very power-stable thanks to its time control system (TCS - balances brightness and runtime).
This torch comes with a 24 month warranty from the manufacturer, Walther. See the User Manual that comes with the Walther torch.