This thermostat guard with key provides protection to your thermostat against damage and unauthorized adjustment of settings. Easy to install without damaging walls. Fits most thermostat sizes. The clear lock box maintains visibility and prevents color/yellowing. Protect your controllers, save energy and avoid high bills with this universal thermostat lock box. Features 1. Thermostat Guard with key: Thermostat covers with 2 keys prevents tampering, damage and unauthorized adjustment of thermostat settings. Keep your controllers away from pesky fingers, protect your thermostat and avoid high bills. 2. Fits Most Thermostats: Suitable for most thermostats on the market. It can be used in home, office, church, school and industrial environment etc. 3. Clear thermostat lock box is better than clear thermostatic lock box made of plastic, it will not change color and yellow, and it can maintain the clear visibility of the inside even after long-term use. 4. Punch/no punch: There are two installation methods of punching and nano glue. 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. Specification Material: Plastic Color: Blue Size: 18.7 x 11.4 x 5.5 cm Weight: 310 g Package Include: 1x Thermostat Lock Box with Key