There are five light modes: Solid is 20 lumens for 11 hours, Peloton/group six lumens for 20 hours, Pulse 20lm, Day flash 65lm for 20 hours and Night flash 20lm. You can also run it in a radar-only mode, which gives a battery life of around 25 hours.
Charging from empty takes about 1 hour and 45 minutes using a standard 5V 1amp USB plug; it has a USB-C port.
The light weighs 69 grams on its own, and with the seatpost bracket set up for a round 27.2mm seatpost it weighs in at 110 grams.