CatEye:

The compact and lightweight Nano60 is designed for riders seeking maximum visibility in a minimalist package. Featuring CatEye’s 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, it’s 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 Ø 22.0–32.0 mm)
IPX4 water resistance
Approximate 11-hour runtime on standard mode
Approximate 3-hour charge time (0.5A)