Secure your valuable possessions with this smart product! Padlock with built-in powerful alarm that warns when the lock is tampered with.The 110 dB siren sounds for ten seconds and sounds again when touched again.Made of stainless steel and very hard to break. Can be used both as an alarm lock or as a normal lock.- Dimensions approx: 10 x 9.5 x 3.6 cm- 3 keys- When changing the battery: There are 2 screws on the inside of the lock- Battery: 6 LR44 batteries not included (demo batteries included) Large padlock with alarmSecure your belongings with a built-in powerful alarm that warns when the lock is tampered with.Built-in powerful alarm that warns when the lock is tampered with. The 110 dB siren sounds for ten seconds and sounds again when touched again.Made of stainless steel and very difficult to break. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia