The Owimin Intelligent LED Bicycle Laser Taillight casts bright red lines and a bike symbol behind your bike, increasing visibility for motorists near you. It also reinforces the newly passed “Three Feet Law“, which is intended to give cyclists the room they need to safely ride along side vehicles. This product probably wouldn’t work so well in the day time, but in the darkest places where you need it the most, it’s sure to get the attention of driver. You can find the product at Amazon.com.
You’re also going to need some AAA batteries. I recommend Energizer AAA Ultimate Lithium Batteries