CatEye:

The compact and lightweight Nano60 is designed for riders seeking maximum visibility in a minimalist package. Featuring CatEyes latest OptiCube lens technology, it projects a long, bright beam with over 180 visibility that remains highly visible even in daylight. With six versatile modes and USB-C recharging, its a reliable, set-it-and-forget-it rear light ideal for everyday safety.

Features
1 LED (60 lumens) with long rear beam projection
OptiCube lens technology for wide, powerful visibility
Highly visible during daytime with two Daytime HyperFlash modes
Six light modes: High / Low / Flashing / Group Ride / Daytime HyperFlash 1 / Daytime HyperFlash 2
Compact and lightweight design (20 g)
Lithium-ion polymer rechargeable battery
USB-C rechargeable (USB-C cable not included)
Low battery indicator
Mode memory function
Battery Auto Save (automatically switches to flashing when battery is low)
New SP-14-RA seatpost bracket fits aero posts up to 130 mm circumference
Snap System compatible with saddle rail and rear rack brackets
Simple, fast rubber band mounting (fits 22.032.0 mm)
IPX4 water resistance
Approximate 11-hour runtime on standard mode
Approximate 3-hour charge time (0.5A)