Mechanical counting of this product.
Wheel radius is large.
Humanized design of the handle, comfortable to use.
Product can be folded, easy to carry.
Stent stable,product can stand and park.
Wall to point Measurment
Place measuring wheel on the ground,with the back of your wheel up against the wall.
Proceed to move in a straight line to the end point
Stop the wheel with the lowest point over the make.
Record the reading on the counter .
The reading must now be added to the radius of the wheel .
Diameter of wheel(mm)