How to setup the coin battery inside Moff Band?
Please remove the silicon cover of Moff unit.
Then, by using a coin, turn it clockwise.
Detach the battery cover and install a coin battery enclosed in the parcel.
After you install it, put the battery cover back again.
Turn the battery cover counter-clockwise.
Put back the silicon cover again.
You can also see the video below on how to setup the battery.