The SEO7R has everything that you could wish for in a modern headlamp. 220 lm1 strong with a 130 m1 lighting range. The Optisense technology (dimming function) ensures an automatic adjustment to the lighting conditions. It can also run on rechargeable or on normal batteries. That makes sense, right?220 Lumens20 Hours130 MetersPower - high light output for every situationLow Power - economical light for long battery life, glare-free reading and workingBlink - automatic emission of light impulses at regular intervalsFront Switch - Front SwitchTransportation Lock - Transportation LockDimmable - Dimmable IPX6 - Protection against water projected in powerful jetsLow Battery Warning - Low Battery Warning Charge Indicator - Charge Indicator By using rechargeable batteries, you're not just protecting your wallet, but also the environment. Regular batteries, after all, require up to 500 times more electricity to produce than they can release themselves. Combined with the energy consumption for transport and storage, the CO2 emissions are huge.LED Configuration - 1 x Power LEDLuminosity - MAX 220 lm - MIN 20 lmLighting Range - MAX 130 m - MIN 40 mBattery Duration - MAX 20 h - MIN 5 hBattery - 1 x Polymer 3.7VBattery Capacity - 3.26 WhWater Resistance - IPX6dust resistance - IPXXRechargeable - YesHead Diameter - 29 mmWeight - 93 g Ledlenser Warranty7 years warranty on Ledlenser lamps when registered online (click here to register). The 7 year warranty is from date of purchase if registered - otherwise, warranty is 5 years on the Ledlenser lamp (from date of manufacturing) and 2 years on rechargeable batteries (keep your receipt for this one!)