Handheld digital optical tachometer with laser pointer for contact free measuring of objects in motion. Using the laser pointer, you can easily aim the tachometer at the right measuring point and measure at longer distances. By attaching reflective tape to the object, the tachometers measurement beam reflects when the tape passes the beam and the rotation is then registered. Automatically saves max, min and last measurement value. The tachometer is suitable for use for contact free measuring of speed for fans, pumps, motors and other rotating objects. DT-2234BL is crystal controlled which is why no external calibration is necessary.Supplied in hard case with reflective tape, certificate from Lutron, Norwegian, Swedish and English manuals. Batteries purchased separately. CE-approved.