SERFAS Serfas Thunderbolt 20 Head Tail Light Combo Bicycle Night Riding 7 Modes 50 and 120 Lumens

Serfas' Most Popular Combo Kit Headlight: 120 Lumens* Tail Light: 50 Lumens* Auto Safe Mode Extends Runtime An Additional 45 Minutes USB Rechargeable Thunderbolt 2.0 Headlight: Solid Modes: High (60 Lumens): 1.5 hrs, Medium (40 Lumens): 2.5 hrs, Low (20 Lumens): 5.5 hrs Flash Modes: *Daytime Flash (120 Lumens): 23 hrs, High Flash Slow (60 Lumens): 12 hrs, High Flash Fast (60 Lumens): 7.5 hrs, Low Flash (25 Lumens): 18.5 hrs, Auto Safe Mode Extends Runtime an Additional 45 Minutes Weight: 40 Grams with Bracket User Replaceable Battery: Lithium Polymer, 500 mAh Thunderbolt 2.0 Tail Light Solid Modes: High (25 Lumens): 1.5 hrs, Medium (15 Lumens): 2.25 hrs, Low (10 Lumens): 5.5 hrs Flash Modes: *Daytime Flash (50 Lumens): 19.5 hrs, High Flash Slow (25 Lumens): 9.5 hrs, High Flash Fast (25 Lumens): 5 hrs, Low Flash (10 Lumens): 13 hrs, Auto Safe Mode Extends Runtime an Additional 45 mins Weight: 40 Grams with Bracket Battery: 500 mAh Lithium Polymer Brand: Serfas