Features: Feature:The design of the large thermostat lock cover with a key prevents unauthorized adjustments and ensures stable temperature settings, making it important tool for maintaining good temperature control. This clear thermostat cover is produced of acrylic for easy viewing of settings, while providing sturdy defense against tampering and damage. 2 locking methods, password lock: Initial password: 000, keep the lock locked, swing the levers from position A to position B, confirm the password you changed, reset the levers, and complete the password setting. Keylock: Regardless of whether the password lock is correct or not, the thermostat defense box can be unlocks with a key. There are two unlocking methods to prevent key loss or forgotten password, which is more thoughtful. Very suitable for use in offices, schools, hospitals, and shopping centers, where precise temperature control is vital for comfort and efficiency. Protect your thermostat with this lockable cover to secure safety. Specifications: Component : Acrylic Size: Mixed size Package Includes: 1 set Controller Lock Box note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.