Stylish lucky cat design. Electronic doorbell with infrared sensors. Sensor range: 3-7 m. Used to welcome guests. Power by 3* AAA batteries (not included). Bila ada orang lewat atau datang mengeluarkan suara hello,welcome Specification: Battery by 3 x AAA battery ( not include ) It is advised to use it in the places where there is enough light.when the voice weak,please replace the battery in time. Meterial: ABS