SEO® 3 LED headlamp. The new headlamp series with its youthful design starts out with the LED LENSER® SEO® 3. It uses three high-quality LEDs with up to 90 Lumen. Just like all of the LED LENSER® SEO® lamps, it offers a key lock to prevent the lamp from switching on accidentally. The LED LENSER® SEO® 3 is a high-quality headlamp with impressive performance. SMART Light Technology (SLT). Rotating head. Glare-Free red LED light. Exchangeable headband. Carabiner. Transport securing mechanism. High comfort level. Low weight. Included in delivery. 1x set of batteries. 1x washable headband. Carabiner. Operating instructions.