Blackburn's most powerful flasher features two LEDs that pump 65 lumens into the environment, so keep an eye out! Side visibility up to 270 degrees, Li-Po battery, waterproof to IP-67 standard, micro USB charging. 50 Lumen (1.6 h), 65 Lumen (3 h), 35 Lumen (6 h) flashing WEIGHT 48 g