Hi @nialllove , bluetooth range depends on your surrounding environment. In ideal situations most Anker bluetooth earbuds should be able to average round 40-50ft (12-15m), this would be out in the open with a clear line of site. Range will be reduced depending on obstructions such as walls (materials), temperature or RF interference.
So depending on your house build, 12ft through walls etc sounds reasonable. Have you tried them in a larger open area, such as the garden etc?