1. Thermostat Lock Box with 2 Keys prevents tampering, damage, and unauthorized adjustments to thermostat settings. Keep pesky fingers away from your controllers and protect your thermostat from bills. 2. The open thermostat guard allows for installation without removing the thermostat from the wall. Simply punch holes around the existing thermostat to install it in the correct position. You can mount this thermostat protector horizontally or vertically on the right thermostat. 3. The transparent temperature control box is made of quality acrylic, which is to plastic transparent temperature control boxes. No discoloration, no yellowing, and the interior remains clearly visible even after prolonged use. 4. The home thermostat box fits most thermostats. The outer dimensions of this thermostat lock box are 7.87 x 5.51 x 1.97 inches. The actual usable dimensions are 6.5 H x 4.72 W x 1.65 D. It accommodates all thermostat shapes as long as they are smaller than or equal to 6.5 H x 4.72 W x 1.65 D. Please verify the size before .