The Spot 400 Headlamp is designed to meet the needs of the most discerning technical users who require high-performance features from a compact and portable headlamp. This user values a small size and portability but also needs the flexibility to run the lamp on alkaline batteries if a power source is not readily available on extended expeditions. This headlamp offers a maximum output of 400 lumens. It features Dual-Fuel technology, allowing it to be powered by three AAA alkaline cells (included) or the rechargeable BD 1500 Li-ion battery and charger (purchased separately) for maximum flexibility. With PowerTap Technology, you can instantly adjust between total output and dimmed power, and the integrated battery meter display shows the percentage of power remaining. The Spot 400 Headlamp offers a range of settings, including proximity and distance modes, dimming, strobe, red LED night-vision, and lock mode. The red night vision has dimming and strobe modes and activates without cycling through the white way. The Brightness Memory feature allows you to turn the light on and off at a chosen brightness without reverting to the default setting. The headlamp features multifaceted optical efficiency lens technology and is waterproof with an IPX8 rating, tested to operate at least 1.1 meters underwater for 30 minutes. Water may enter the battery compartment even if submerged, but the lamp will still operate; it should be thoroughly dried out after use in wet conditions—the Digital lock mode safeguards against accidental use when stored in a pack or pocket. In summary, the Spot 400 Headlamp offers all-around performance and features and is perfect for technical users who require a small size and compact package. The headlamp is flexible, versatile, and adaptable, offering maximum performance and efficiency on a day hike or night climbing at the Buttermilks.