Like it says on the tin - Battery management system for Shorai LiFePO4 batteries. Includes cable to hard wire connector on bike so battery can be charged or maintained if not ridden for a few weeks.

http://www.shorai.co.nz/product-list...ms01-p-63.html

Probably about 2 years old (came with current bike), have only used it a few times. Printed manual pages included.

Selling as I'm swapping out the Shorai battery in my bike (it's not happy on cold Sth Is mornings).

Trademe listing