Feature:With 5 superbright Red LED indicators and 2 laser beams design, easy to be noticed at nightLED indicators and laser beams can operate simultaneouslyThe "bike logo" can be projected behind the bike so as to warn the behind vehicles to keep safe distanceWith an adjustable clamp, easy to install and removeThe LED indicators and laser beams have 4 flashing modesAuto-off after parking about 5 minutes to reduce power consumptionSpecification:Durable & fine workmanshipBattery: 2x AAA battery (not included)Switch: 2 buttons (On, Off and mode select)Waterproof level: daily life waterproofLighting color: redCasing color: black & redSize: approx. 8.6 x 3.1 x 4.9cmBicycle mount fits approx. 20-36mm diameter tubesPackage Include:1x Laser Bike Tail Light1x Bicycle Mount