Replaced battery and instead of usual four dashes coming up (- - - -) what appears to be four battery symbols come up. Tried several new battereies, same results. Can't find model no. anywhere on scale. Has silver studs over stand on area. Three buttons to left of digital readout are power, mode & memory. Buttons right of display are up, down & enter. Also says low, normal & high below readout area. Would like complete manual to use other features besides scale. Thanks