🚨 Upgraded the past red and blue flashing police light to now the only red flashing light as some states' laws do not permit the use of blue lights on bicycles unless they're law enforcement ☀️ Brightest directional light: 39 high power LED lamp beads, up to 100 lumen output, be seen from 150 feet away in foggy rainy day or night, IPX6 waterproof 🚴 USB rechargeable STEERING TAIL LIGHT with built-in large capacity battery, run time 10 hours after 4 hours be fully charged; feature that automatically turned the turn signal off after 15 flashes (15 seconds). When riding in the daylight, it is too easy to forget the flasher is "on", but with an automatic turn off built in that is not a concern 🎮 Pair both the front and back signal units at the same time, recommend buy 2, easy install at front and back more safer 🎁 Free 1-year warranty for rear bike light, 60 days return, include extra backup battery, gift boxing wrapped, best present light for kids Men Women Road Cycling