Accurate, set and walk away, digital temperature selection accurate within +/-0.2 degrees C. High grade aluminum block cavities are precision machined providing unsurpassed temperature transfer. Digital timer can alert user that a chosen time interval has timed out (timer does not turn heater off). Blocks available for compatibility with common tubes and plates. Built-in user recalibration function for long term temperature accuracy. Includes block lifter with temperature insulated handle. Specifications: Temperature range: Ambient +5 to 150 degrees C in 0.1 degrees C increments (max. temp of BSH1004 is 130 degrees C). Temperature accuracy & uniformity: ±0.2 degrees C. Timer: 1 to 999 minutes. Dimensions: Single position: 7.9" x 9" x 3.2"/20 cm x 23cm x 8cm, Double position: 8.7" x 10.3" x 3.2"/22 cm x 26cm x 8cm, Four position: 8.7" x 14" x 3.2". / 22 cm x 35.5 cm x 8 cm