Yalumi # Bicycle Light Set Stellar Quality Twin Set Bright Safety Bike White Headight and Red Tail Light with High Brightness Constant Beam and Red Flashing Strobe/flexible Silicone Strap 2 Lighting Modes: White/Red High Beam, and Flashing Strobe High Brightness White & Red LED - Battery Type (Included) 2 Each CR2032 Lithium Coin/ Water Resistant IPX4 Fits as Rear and/or Side Bicycle Safety Light in Dim Light or at Night Flexible Silicone Strap can Attach Easily to All Size Bars Maximum Burn Time: 30 hrs on Max Mode and 90 hrs on Strobe Mode.