The Boston medium Mina Crandon, aka Margery, used a number of devices to communicate with the dead, and also to establish the authenticity of those communications. This is one of her voice machines, but I’m not entirely sure which one it is. Oh wait, this must be the “spirit bell box.” Those are clearly bells inside.
Although Margery’s feet and hands were held or tied during seances, the bells in the box would ring out during the seance, supposedly rung by the spirit of Margery’s dead brother Walter. However during one demonstration, Houdini felt Margery’s feet manipulate the box, just as J. B. Rhine saw Margery use her feet to recover a spirit megaphone that had temporarily gotten away from her.
That is Margery in the picture, but I don’t know who the two men are.