With 5 super bright Red LED indicators and 2 laser beams design, easy to be noticed at night.LED indicators and laser beams can operate simultaneously.The "bike logo" can be projected behind the bike so as to warn the behind vehicles to keep safe distance.With an adjustable clamp, easy to install and remove.The LED indicators and laser beams have 4 flashing modes.Auto-off after parking about 5 minutes to reduce power consumption.Durable, fine workmanship, safe bicycle LED indicators.Type: Laser Bike Tail LightLED Quantity: 5Lighting Color: RedLaser Power: Less Than 0.5MWWaterproof Level: Daily Life WaterproofBattery: 2 x AAA Battery (Not Included)Switch: 2 Buttons (On, Off and Mode Select)Bicycle MountSuitable Tubes Diameter : 20mm - 36mm/0.79" - 1.42" (Approx.)Size: 8cm x 4cm x 2.2cm/3.15" x 1.58" x 0.87" (Approx.)Instructions:Long press the LED button for 2 seconds to turn on/off the 5 indicator lights, then press LED button once to switch lighting mode (4 modes).Long press the LAS button for 2 seconds to turn on/off the 2 laser beams, then press LAS button once to switch lighting mode (4 modes).Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Include:1x Laser Bike Tail Light1x Bicycle Mount