The perfect commuter light that crosses the boundaries of ‘to see’ and ‘be seen’ now at 850 lumens. For the rider who wants a minimalist light and a high output. An array of runtime options selected via the OMS can cater for different rides and conditions, whilst side illumination maintains safety throughout the urban jungle. Also featuring our DayBright pulse pattern, this slick unit lights up the streets both day and night.Can be helmet mounted (helmet mount sold separately). Key Features: Weight: 84 grams, Output: 850 lumens, Runtime: 1.5-36 hours, LED Configuration: 1 x White XPL2, Battery: 2900mAh Lithium Ion, Rechargeable: Through Case USB, Charge Time: 5 hours, Material: Anodised 6063 Aluminium, Water Resistance: IP6, Length: 110mm, Head Diameter: 28mm, In The Box: Sirius MK9, Handlebar Bracket, USB Charge Cable, QS Guide.