This is 16 Songs Wireless Battery Powered Intelligent Sensor Welcome Doorbell-136. Doorbell chimes provides an extra security and convenience for you and your family￡? you can put this Doorbell to any places of your room. This Wireless Doorbell is excellent for being used at home￡? office￡? shop or any places need to welcome the guests or the customers. Light control distance is 3 ~ 7 meters. It is advised to use it in the places where there is enough light. Your ideal choice!                                    Features            New and high quality<br>Made of high-quality material of aluminum<br>Extend your home security system<br>Keeps you aware of intruders or visitors anywhere around your home<br>Suitable for home￡? office￡? unit￡? shop￡? warehouse￡? shed￡? garage etc<br>                                                            Specifications                        Power Supply          3 x 1.5v AA batteries (not included)        <br>          Three Settings          Music / Off / Voice        <br>          Music Kinds          16        <br>          Dimension          2.55" x 1.37" x 3.93" (L x W x H)        <br>          Material          Plastic        <br>                                                              Package Includes            1 x 16 Songs Wireless Battery Powered Intelligent Sensor Welcome Doorbell-136<br>1 x Installation accessories<br>