The Lezyne KTV+ Drive is a compact, easy-to-fit rear light for everyday riding. It gives up to 75 lumens in Day Flash and up to 30 hours in Femto mode, and Wide Angle Optics spread that light across up to 270°. The rubber O-ring mount fits round, D-shape and aero seatposts. Key Features 75 lumens maximum, up to 30 hours runtime Daytime Flash mode for visibility in daylight Wide Angle Optics give up to 270° of visibility Co-moulded body with a lightweight rubber O-ring mount IPX7 waterproof rating USB-C charging through a water-resistant port 400mAh user-replaceable battery (EU Batteries Regulation 2023/1542) Compatibility Round, D-shape and aero seatposts Included KTV+ Drive rear light O-ring mount Not Included USB-C charging cable Specification Specification Detail Position Rear Maximum output 75 lumens Maximum runtime 30 hours Output modes 6 Battery 400mAh, user-replaceable Charging USB-C (water-resistant port) Water resistance IPX7 Mounting O-ring seatpost mount; fits round, D-shape and aero seatposts Weight 32.6g Dimensions (L x W x H) 39.9 x 25.2 x 55mm Colour Black Output Modes Mode Output (lumens) Runtime (h:mm) Blast 20 3:30 Economy 5 10:30 Femto 5 30:00 Day Flash 75 25:00 Flash 40 17:00 Pulse 20 8:30 Fit it, charge it, forget it.