The ideal location of the Pebble is mounted to the wall or headboard, about 10 inches directly above the sleeper’s head. It can also sit somewhere near the sleeper.
The Pebble should not sit more than one meter away from the sleeper. It also shouldn’t sit near a fan, vent, radio, or white noise machine. The Pebble won’t be as effective if it is placed on a dresser or table that is significantly taller than the bed.