The compact nano60 rear light delivers powerful visibility in a tiny lightweight package. Featuring the latest opticubetrade lens technology it's bright enough for daytime use and slim enough to disappear on your bike. The included sp 14 ra bracket fits modern aero seatposts and snap systemtrade compatibility makes it easy to mount wherever you need it. Features compact and lightweight design opticubetrade lens technology for daytime visibility usb c rechargeable lithium ion polymer battery six light modes including daytime hyperflash options mode memory and battery auto save function snap systemtrade compatible for multiple mounting options sp 14 ra bracket fits aero seatposts up to 130 mm circumference specifications light source 1 led 60 lumensbattery type rechargeable lithium ion polymerrecharge method usb c cable not includedlight modes high low flashing group ride daytime hyperflash 1 daytime hyperflash 2mounting bracket sp 14 ra fits aero seatposts up to 130 mmadditional features low battery indicator mode memory battery auto savemounting system snap systemtrade compatible