The Lezyne Infinite Light External Power Pack is a bicycle accessory designed to provide additional power to Lezyne lights during long rides. It is a portable power source that can be easily attached to the bike frame or carried in a backpack. The brand Lezyne is known for producing high-quality cycling accessories, and this power pack is no exception. It is a reliable and durable product that ensures cyclists have enough light to see and be seen on the road.

Power pack was used a handful of times. Works fine.

Full specs here https://ride.lezyne.com/products/infinite-light-power-pack

Items selling is the power pack. No light