3 mode: Always, flsah, fast flash
Battery by: 3V button battery (Included)
Waterproof, durable, steady, made of silicone.
It works between 40 degrees below zero and 220 degrees.
Always mode lasts 35 hours, flash mode lasts 160 hours.
Easy to install or remove within 3 second.
Can be installed on handles, seat cushion standpipe, backpack, helmet ect.
Excelent company for hangging out at night , hiking, cycling.
2 x Black Bicycle Light