Frankly, we prefer birdsong in the forest without question. But there's no escaping the mood-lifting effect of birdsong as a sound box from the ZWITSCHERBOX. The ZWITSCHERBOX can be placed on shelves in workrooms, corridors and other adjoining rooms. It can be placed or hung up. The sound itself is activated by a motion detector and fades out after about two minutes if there is no movement. The volume can be adjusted or the ZWITSCHERBOX can be switched off using the small wheel on the side. It is powered by three standard AA batteries (included), which can be replaced after unscrewing the back plate.