OUTAD Adjustable Beam Focus LED Headlamp with 4 Modes and 300lm Lamp Bulb Ultralight: 2.6 ounce only, comfortable when wearing. 4 Working Modes: High light; low light; emergency flashing; SOS mode. Extremely Long Life-span LED: More than 100,000 hours. Variable Focal Length Headlamp: Stretch out or draw back the lamp cap to adjust the headlamp's zoom. WARRANTY: 12 months from the date of purchase.