ALL-IN-ONE SET: Includes HeatBank® 6 rechargeable hand warmer, 100-lumen LED headlamp, lanyard, and USB cable. LASTING WARMTH: 4,400mAh lithium-ion battery delivers up to 6 hrs of 360° heat (up to 120°F/50°C) with 3 settings. DUAL FUNCTION: Doubles as a USB power bank for phones, cameras, and more. Auto-charges when connected. BRIGHT HEADLAMP: Six brightness modes, adjustable band and angle, up to 80 min runtime. Recharge via HeatBank® or micro USB. Specifications: Battery: 4,400mAh lithium-ion (rechargeable) Runtime: Up to 6 hrs heat / 80 min light Heat: 3 levels, 120°F max Charging: 5V2A USB out / micro USB in Size: 4.25? x 1.73? x 0.95? | Weight: 0.31 lbs Features: Indicator lights, ergonomic design, lanyard included