Review on G Keni Rechargeable Bike Tail Light with Anti-Theft Alarm, Electric Horn, Bike Finder/Tracker Remote, IPX6 Waterproof Mountain Bike Accessories by Dustin Gabrielle

Fast background. I sold my car in 2015. I ride my bike everywhere, in all weather (rain, snow, heat over 30°C) and in the metropolitan area, which means bike theft is always a problem. It's definitely not as bad as in big cities like San Francisco or New York (I don't think it will last long there, a determined thief would snatch this thing off a bike and trample it on without difficulty). I really can't complain about the price (although there are a few issues to be aware of). The light is very bright and seems very durable (along with the radio key fob). The alarm is quite sensitive and I could easily spot false alarms on a windy day. I haven't done extensive testing to see how long the alarm lasts, but it's definitely loud. The only real problem I have is the binding system. The light comes with two mounts, one attaches to the seat rails and the other attaches to the seat post. I've only tried the first one (the rear rack bag makes using the seatpost pointless because the bag gets in the way). The flashlight slides into a guide on the mount and a plastic tab locks it in place. This plastic tab is very brittle in cold weather and doesn't require much force to remove from the bike. I expect it to chip off over time at room temperature, but that's no big deal. The caterpillar on which the lantern slides is very solid. Unfortunately the (plastic) mounts also become brittle in the cold and the whole thing broke when I touched it while the bike was in motion about a week or two after purchase. I came up with a temporary solution to use zip ties to firmly attach the canopy to the saddle rails. My long-term solution is to eventually develop a 3D printed mount and make it available to the public (google "thingiverse"). Because the lantern is under the saddle it doesn't get too wet when it rains, but I didn't expect it to last long in this case. So far I haven't had any issues with the light not turning on or the alarm not working. I charge it via a USB battery pack every few days while I'm at work (I'm very happy that my employer allows me to bring my bike inside). Right now, this flashlight costs less than $25. In terms of light quality, alarm volume and reliability, this should be something any serious cyclist should invest in.