?OurT-299 1-to-1 260m Intelligent Wireless Remote Control Doorbell Set (with Long Flat Pressed Doorbell + Common Plug-in Receiver)isdesigned for all thepeople looking for a reliable and convenient doorbell. Adopting simple but fashionable design£¬ our wireless doorbell will add much brilliance to your house and it's quite humanized and easy to install. The transmitter button is waterproof and there are 48 pieces of optional 16 polyphonic melodies with 4 grades volume regulation for you to choose. Moreover£¬ our wireless doorbell exclusively uses a new generation of constant-voltage circuit design to achieve a highly efficient energy-saving effect and effectively improve the life of doorbell (more than 50%). 260m working distance is also available to meet different needs of the family environment. Never miss such a multifunctional item!                                    Features             Strong dust &amp; water resistance<br> There are 48 pieces of optional 16 polyphonic melodies with 4 grades volume regulation for you to choose<br> You can install the doorbell in many locations£¬ such as kitchen£¬ back yard£¬ bedroom£¬ etc. so that you¡¯ll never miss the guests<br> Completely wireless operation - no wires or cables required<br> Wireless mounting design never affects your inner decoration and you can make the doorbell anywhere you like <br> 260m working distance<br> Very easy to install and cost-saving<br> Ultra-distance represents the technology of surpassing obstacles<br> Unique design appearance shows the special taste of the host<br> Energy-saving£¬ low power consumption and environment protection£¬ without harmful effects on the environment and do no harm to personal safety<br> Keep you aware of intruders or visitors anywhere around your home<br> Exclusively uses a new generation of constant-voltage circuit design to achieve a highly efficient energy-saving effect and effectively improve the life of doorbell (more than 50%)<br> Use of wireless high-frequency transmitter technology£¬ effectively avoiding mutual interference between the neighborhood and false ring annoyance<br> Can also used for liaison£¬ paging£¬ patient care£¬ emergency notification and other special purposes<br>                                                            Specifications            Model    T-299    <br>Melodies    48 Kinds Musical Tones and 16 chords for Selection    <br>Doorbell Receiver Dimensions    (3.86 x 2.36 x 1.38)" / (9.8 x 6 x 3.5)cm (L x W x H)    <br>Transmitter Dimensions    (3.54 x 1.85 x 0.79)" / (9 x 4.7 x 2)cm (L x W x H)    <br>Transmitter is Powered by    1 x 12V 23A Battery (Included)    <br>Remote Control / Receiver Distance    260M    <br>Receiver Operating Voltage    AC 110-220V/ 50-60Hz    <br>Volume    50 ~ 80dB    <br>Power Consumption of Transmitter    &lt;10mW    <br>Material    Plastic    <br>Color    White &amp; Black    <br>Weight    165g / 5.82oz    <br>                                                            Package Includes            1 x Doorbell Receiver <br>1 x Transmitter<br>2 x Screws<br>                                                            Extra Info            For the charger: <br>If you need a EU charger£¬ click here: Universal US / EU to EU Power Plug Converter Adapter<br>If you need a AU charger£¬ click here: Universal US / EU to AU Power Plug Converter Adapter<br>If you need a UK charger£¬ click here: Universal EU US AU to UK AC Power Plug Converter Adapter