Blackburn Grid Rear at 4 functions: you can choose if you need a high intensity light or an extensive battery life. An ideal light for those who pedal having care to be seen by other vehicles. Maximum 40 lumens for a bright red light. COB LED Technology for a more intense light for the same light power. The silicone strap allows you to attach this light to a variety of dumbbells, frames or other. Equipped with a removable clip in order to be attached to backpacks or your belt. Rechargeable with USB-C cable. The ignition button lights up green (100-50%), orange (50-25%) and red (25-0%) to indicate the battery status. Waterproof Resistant IP65, that is, resists jets of water (i.e. the rain) and does not make the dust penetrate inside the light. Auto-Eco function: for intermediate functions, when the battery reaches less than 25%, this function is activated which offers 2 additional hours of light. 4 Functions: - High Solid: maximum power 40 lumens for 1.5 hours - Constant Pulse: 4 hours at 30 lumens (+ 2 hours in self -eco) - Fast Strobe: 7.5 hours at 20 lumens (+2 hours in Auto -Eco) - Eco Flash: 20 hours at 20 lumens.