Batteries included but removed for storage purposes. No original box or manual, however a copy can be downloaded free at link further down the page.
BT 6510 Twin Cordless Phone with Answering Machine & Nuisance Call Blocker
BT 6510 BT6510 Cordless Phone Additional Expansion Handset BT6500
BT Essential Twin Cordless Home Phone Nuisance Call Blocking Answering Machine
BT Everyday Twin Cordless Home Telephone Nuisance Call Blocking Do Not Disturb