The Sealey SM3002DFD Digital Feed Display features both imperial and metric readings The Sealey SM3002DFD is a digital feed display for the cross slide and the compound tool rest to replace the standard graduated scales. Imperial or Metric readings may be selected and the reading can be zeroed at any point. These LCD units improve accuracy, save reading time and minimise errors. Features: Supplied with LR44 batteries These LCD units improve accuracy, save reading time and minimise errors Imperial or Metric readings may be selected and the reading can be zeroed at any point Digital display for the cross slide and the compound tool rest to replace the standard graduated scales Three decimal place (Metric) and four decimal place (Imperial) displays with an accuracy of ± 0.025mm/0.001\" Specification: Model No: SM3002DFD Cell: LR44 - 1.5V Alkaline Accuracy: ± 0.025mm/0.001\" Metric Display: 3 Decimal Places Imperial Display: 4 Decimal Places