Review on Stay Safe While Cycling With G Keni Smart Bike Tail Light - Auto On/Off, Waterproof, USB Rechargeable, And Ultra Bright LED Warning Back Bicycle Flashlight! by Avishai Menon

Great size, feels well built, very bright and 4 light modes. Break sensor is pretty good testing by hand or on scooters in the garage. Looking forward to trying on my electric skateboard next month. Says to mount vertically but it worked well on my son’s tricycle horizontally. Instructions that come with the light could be clearer. Questions section answers them but here’s the details in one spot:Motion Sensor = Brake light (all modes)Light sensor = Auto On/Off (mode 1&2):Modes:1: Normal FlashAuto Off in sunlightAuto Off when still for 30 secondsAuto On in dark2: Breathing FlashAuto Off in sunlightAuto Off when still for 30 secondsAuto On in dark3: Fast FlashAlways on day or night4: Steady OnAlways on day or nightCOB LED700mAhIPX65 waterproofSmart light sensingSmart Breaking180° visibleWaterproofDustproofShockproof12 month warranty30-day money backItem Dimensions LxWxH3.03 x 1.02 x 1.1 inches77 x 26 x 28 mm