ULTRA BRIGHT 400 LUMEN - This exceptional product features 5 high-performance LED lamps that deliver an impressive 400 lumens of brightness, illuminating the darkness of night and dimly lit spaces brilliantly. The light remains exceptionally bright and clear at full capacity for up to 4 hours. | DYNAMIC LIGHTING OPTIONS - Setting a new benchmark for headlamps, this is the world’s most powerful silicone headlamp. It offers 7 lighting modes to choose from, with 4 brightness levels for each mode. Utilize the mode creator app to unlock an extensive library of lighting modes. | USB RECHARGEABLE BATTERY - Our rechargeable USB battery conveniently pops out without the need for any charging cables. Fast-charging technology allows the Bilby to be recharged in just 4 hours from a completely drained state. | LIGHTWEIGHT & COMFORTABLE – Designed with lightweight silicone for optimal durability and comfort in any environment. The unique chassis design keeps the battery and LED lamps assembled as a single unit, weighing only 90 grams. | COMPLETELY WATERPROOF - Constructed robustly to function efficiently and continue to shine brightly through rain, adverse weather, and wet conditions. You can even submerge your Bilby in water up to 1 meter deep for a duration of 30 minutes without any issues.