Digital Absolute + Axis Goniometer (Built In) Undercast Padding but desirable sounds and louder geri chairs but desirable sounds and louder With Child Seat * Heavy duty steel base for improved strength and durability * Factory calibrated to ensure accuracy * Easy to clean trays and seats guarantee long lasting reliability * Rotating poise bars for dual reading of pounds and kilograms The integral absolute vertical and horizontal levels are permanently incorporated into the digital goniometer arm * Goniometer reads 0 180 degrees on LCD screen * Has ability to freeze angle measurement * Powered by 1 9V battery * Goniometer exterior is powder coated steel with inch cm marks screened onto arms * Digital angle reached in center * Horizontal and vertical levels to indicate level or plumb starting point *