Suitable for christmas time. Santa Claus is coming. You can set Waiting time before start bell. Waiting time is folowed by three bells: start, main and finish. You can set every bell seperatly: - duration - The same volume level or gradually intensifying sound or sound gradually debilitating - Type of bell (one of four) Also it works with display off. You can set min. and max. volume for gradually intensifying sound or sound debilitating.