Item Type: Thermostat Lock Box Material: Acrylic Outer Size: Approx. 15 x 12 x 5.5cm / 5.91 x 4.72 x 2.17in Inner Size: Approx. 12.5 x 9.5 x 5cm / 4.92 x 3.74 x 1.97in Application: Suitable for 4.92 x 3.74 x 1.97in or smaller thermostats. Package List 1 x Thermostat Combination Lock Box 1 x Key 4 x Screw 4 x Expansion Screw 4 x Tape 1Combination Lock: The thermostat lock box features a combination lock that allows you to set your own password to maintain the temperature setting you want. It prevents tampering, damage and unauthorized adjustment of thermostat settings, protecting your thermostat and helping to control energy use. 2Clear Acrylic: The thermostat lock box is made of acrylic, which is transparent and sturdy, will not discolor or yellow, and will remain clearly viewable inside for long term use. 33 Digit Password: This thermostat lock box has a three digit password, and the lock is replaceable for easy operation, or you can change the password when needed. 4Punched or No Punch: This thermostat combination lock box kit comes with screws and tape, which means you can either punch holes for installation or use tape in order not to damage your wall. 5Fitting: The thermostat combination lock box fits 4.92 x 3.74 x 1.97in or smaller thermostats and is used for most thermostats. Can be used in homes, offices, churches, schools, and industrial settings, etc.