WUZHOU Door Handle Alarm, Hanging Door Alarm Window Alarm Anti-theft Door Handle Alarm Alert Security Alarm Door Handle for Apartment Home Security DOUBLE PROTECTION: The Door Alarm can add a second level of protection lock to the original door lock, and also has more powerful anti-theft performance. EASY TO USE AND OPERATE: Simple operation, one key switch to control the doorbell or alarm, dual mode can be selected, no complicated operation procedure. CAN BE TAKEN WITH YOU: Battery powered (without battery), no need for annoying wires, just hang it directly on the knob handle in the door, turn on the switch to activate the protection alarm. TRAVEL PROTECTION: Window Alarm Can be used for travel and hotel accommodation.You can hang this alarm on doors and windows to prevent illegal intrusion. Widely used in home, office, factory. color: White Size: 65*37*15mm Quantity: 1pc Kind tips: 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering. 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding. 3. Only the above package contents, excluding other products.