The SL-11 StarMapLight from Carson Optical is a red LED Flashlight for Low-Light use. This Flashlight is great for Astronomy, Photographic Darkrooms, or reading theater programs without disturbing others. The StarMap Light comes with a handy attached keychain so you’ll have it wherever and whenever you need it. The SL-11 runs on two included G13A batteries. At Carson, we strive to make sure our customers are 100% satisfied with the quality of our products. We are so confident in our products that we back them with a Limited Lifetime Warranty! Carson will repair or replace your Carson item if it is found to have manufacturing defects in materials or workmanship. Please contact Carson for additional warranty details.