【Fit Most Thermostats】The outer size of the thermostat guard with lock is 7.3''X4.7''X2.2'',Thermostat Cover Fits Thermostats 6.1''X3.95''X2'' or Smaller.Suitable for most thermostats. 【Superior Quality】Compared to most thermostat lock boxes on the market, we have chosen higher quality acrylic material materials, and over time, the display of the thermostat can still be clearly and unobstructed, showing better resistance to color change and yellowing. At the same time, we have also increased the thickness of the box,Quality matters!, 【Save energy&Avoid high bills】The thermostat lock box with key prevent unauthorized adjustments, tampering and damage to thermostat settings by children, tenants, or the public.Relevant statistics show that using a thermostat lock box to lock the thermostat can save at least $80 in energy costs per year. 【Unique Design】 The thermostat lock box with key is ventilated on all sides to avoid interfering with the detection of the current temperature in the room and keep the room temperature stable. Unlike other thermostat lock box, Thermostat cover with lock with rounded corners is designed to prevent bumps and scratches. 【Easy to Install】Two installation methods methods of punching and nano glue. There is no need to remove the thermostat from the wall.Just punch holes around your existing thermostat to install it in the right place.If you don't want to damage your walls, you can use nano glue for bonding (no residue), so your walls will always look like new.