FRONT:The Hecto Drive 500XL is a compact, durable cycling light with a machined aluminum body with built-in cooling fins and cutouts for side visibility. Its single LED design provides an impressive maximum output of 500 lumens and eight output modes, including a Daytime Flash mode. Offering up to 20 hours of total runtime, charging is simple with an integrated cable-free USB stick, and the light straps securely to a variety of handlebar shapes and sizes.REAR:A compact, aero-post compatible taillight, the KTV Drive Rear's lightweight, waterproof (IPX7-rated), co-molded construction offers up to 10 lumens of output as well as up to 270-degrees of visibility via the Wide Angle Optics lens. Choose from 5 different output modes and take advantage of the KTV's 20-hour maximum runtime. You also never have to worry about forgetting your charging cable—the KTV features a built-in USB stick for convenient, cable-free charging.HECTO DRIVE 500XL SPECS:Max Lumens:500Max Runtime:20 hoursBattery Capacity (mAh):650Recharge Type:USB StickWeight:84gDimensions:68mm, 37.4mm, 53.2mmFeatures:IPX7, Daytime FlashKTV DRIVE REAR SPECS:Max Lumens:10Max Runtime:20 hoursRecharge Type:USB StickWeight:45.3gDimensions:64.7mm, 45mm, 38.9mmFeatures:IPX7