The Femto USB Drive Rear is a compact and lightweight USB-rechargeable LED cycling taillight. Femto USB C Drive RearMax Lumens: Max 15 lumensOutputs: 6 combined solid and flash output modes including a highly disruptive Daytime Flash modeBattery Capacity mAh: 210Recharge Type: USB-C waterproof charging cable not includedWeight: 28gFeatures: IPX7 waterproof standard Daytime Flash Wide Angle Optics 270deg of visibility silicone strap included ECONOMY 5 3:40 BLAST 15 1:30 PULSE 15 6:00 FLASH 1 15 3:30 DAY FLASH 15 13:00 FEMTO 5 12:00