VISTOP BS-03 New Bicycle Cycling Laser Tail Light 8 LEDs and 2 Red Smart Laser - 3 Modes Mountain Bike Safety Warning Back Rear Led Red Light PRODUCT DESIGN: It is like a diamond. 8 super bright LED lights and 2 red smart laser line Work with two AAA batteries. All work is generally 3 hours, single open LED lamp 7 hours Working mode: LED lamp has 5 modes, the laser line has 3 modes, you can set the interest combination lights Comes with batteries, seatpost and seatstay mounts If you need to buy rechargeable VISTOP BS-01 taillight. ASIN: B00L43PNOA