Used but in full working order. In excellent condition, only selling as it's not longer required. Please note this is the control unit only. The pads are available separately from the manufacturer. - The Astric Dry-Bed bedwetting alarm is in two parts, an extremely sensitive control unit which uses the latest electronic techniques, and a light, comfortable detector pad which is placed over the mattress protector and sheet, then covered with a smaller sheet - flannelette would be ideal (draw-sheet). As soon as the first few drops of urine touch the pad, the alarm emits a loud tone which will awaken the patient. There is a volume control and you can choose from 3 different sounds.