Frontier Battery Backup - $25 (san dimas)

I have a brand new in the box battery back up for frontier router.
If you have frontier digital voice for your phone service, your phone will not work unless you have the appropriate battery back up.
You will need to install 12 D size batteries This was never installed or used, please make sure it will work with your equipment before purchase , no returns if interested please reply with your number and ill call you if this ad is up then this is avail