The Asteroid fits all new and older Bern helmets with a two-hole mount located in the rear of the shell. Micro USB rechargeable. 12 Lumens. 3 Light Modes (Flash 24 hours, Pulse 6.5 hours, Steady 5.5 hours).Water Resistant.16 grams. 26mm tall, 39mm wide, 20mm thick (w/o bracket )
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