Automatic telescopic measuring rod

Automatic telescopic measuring rod comprising a handle, a hollow handle, a battery and a motor mounted within the handle, the battery installation control switch button on the handle grip attached to the tip an electric telescopic rod, the rear end of the handle flap is hinged, the output shaft of the electric motor telescopic rod connector, a digital display mounted electric retractable rod, the free end of the installation of electric retractable rod displacement sensor, displacement sensor with a digital display through the data transmission line, the end of the outer tube of the telescopic rod motor mounting bracket, two stop rollers mounted on the carriage , two stop rollers are located on both sides of the inner tube and the electric telescopic rod and the inner tube of the telescopic rod with electric contact; battery are connected to a motor, and a digital display displacement sensor; handle, electric retractable rod and placed in the cradle bracket the base support frame through mating with the handle, electric retractable rod.