Bought a 2 pack but I only need one. The other hasnt been touched. Includes 2 mounts. Ill include a fresh set of batteries as well. It has 3 LED’s and 3 modes. Solid, blinking, and pulse. I like these taillights more than the fancy $40 ones. The expensive ones use little watch batteries that dont last long and are hard to find in stores or need to be recharged which is a hassle. These use AAA batteries that are cheap, sold everywhere, and last forever. Expensive ones can be obnoxiously bright. These ones are more than bright enough for everyone to notice you, but wont annoy drivers. You also dont have to worry about it being stolen and remove it from the bike every time you park. This one has a mount that lets you set the angle any way you want. You can also clip it to a backpack or clothing.