4 lumens from a flashlight the size of your thumb! The LED Lenser F1 Flashlight is waterproof (IPX8) and features electronic control with a temperature sensor, a tail stand, integrated roll protection, a reversible pocket clip and a usage optimized appearance. This tiny but mighty light allows for extreme brightness in a lightweight portable housing. LED: xtreme power LED - Lumens: 4 - Beam distance: 1m - Burn time: 2h - IPX rating: 8 (waterproof to 2.5 metres) - Focus: fixed - On/Off: barrel end switch (3 modes) - Energy tank: 3.9Wh - Power supply: 1 x CR123A battery (included) Features - - Xtreme power LED - Smart light technology (smart LED protection) - 3 light functions (power/defence strobe/low power) - High end heat sink technology - Matte black finish - Tough HA III anodised aluminium end cap (waterproof) - Tough HA III anodised aluminium body (waterproof) - Tactical ring capable of breaking glass - Hard gold plated electrical contacts (corrosion resistant) - Anti roll design - Pen clip (included) - Tactical ring (included) - Spare O-ring (included) - Cleaning brush (included) - Micro fibre cleaning cloth (included) - Lanyard attachment (included) - Lanyard hole