Precise Model TT700 ULTRASONIC THICKNESS GAUGE Features: Especially suitable for testing the thin workpieces ●I-E testing mode and E-E testing mode ●Sound velocity testing and single point calibration ●Sound alarm and differential mode are available ●Chinese/English, mm/inch are selectable ●Data store, view and delete ●Result can be print out and transfer to PC Technical Specification: Measuring range 0.15~20mm Display resolution 0.001 mm and 0.01 mm selectable Sound velocity range 1000m/s~9999m/s Operating temperature 0~40℃ Dimension 152mm× 74mm× 35mm Weight 220g Power supply 2pcs.AA batteries