THIS POWER PLATE RESTRICTS ACCESS TO THE POWER BUTTON. THE 25 POWER PLATE IS COMPATIBLE WITH THE TT25 AND T20 GARMIN. THE BUTTON POWER PLATE IS MADE FROM A LIGHT WEIGHT PETG PRINTED PLASTIC WHICH PROVIDES HIGH IMPACT RESISTANCE, TOUGHNESS, AND LOW SHRINKAGE. THE BUTTON POWER PLATE WEIGHS APPROXIMATELY 0.7oz.