Beam n Read LED 3 Hands-Free Travel & Reading Light; for Kindle, Power Outages & More; Includes 2 blue-light-blocking Relaxation Filters; Batteries Last 100 Hours For hands-free personal light anywhere; bright light is easy on the eyes; doesnt disturb others Wide light from 3 LEDs in a row lights up 2 book pages; works with ALL Kindles, eReaders BNR Orange Relaxation Filter softens and warms the cool LED light and blocks energizing blue light Red Relaxation Filter blocks blue light, reduces ambient light, & helps maintains night vision Alkaline AA batteries (not incl) last Extra Long 100 hours, 3-10x longer than most clip-on lights