liztek portable wireless doorbell with 1 remote button and 2 plug-in receiver operating at 1000 feet range with 52 wireless door chimes, batteries not required for receivers liztek the liztek wireless doorbell is your best choice in today’s marketplace when you need to replace that old broken doorbell. the hassle free liztek wireless doorbell ranges up to 1000 feet (300 m), ensuring that you will never miss a visitor again! just plug it in and you are ready to go. with 4 levels of volume you can choose the level that works best for you. enjoy choosing from the 52 different chime options! forget annoying doorbell sounds, now you can have your favorite chime in the volume that you preferthe liztek wireless doorbell is your best choice in today’s marketplace when you need to replace that old broken doorbell. the hassle free liztek wireless doorbell ranges up to 1000 feet (300 m), ensuring that you will never miss a visitor again! just plug it in and you are ready to go. with 4 levels of volume you can choose the level that works best for you. enjoy choosing from the 52 different chime options! forget annoying doorbell sounds, now you can have your favorite chime in the volume that you prefer! <p><br /><strong>specifications</strong> <br />wireless range: 500-1000 ft / 1000 feet is the wides ragnge in a open area<br />tunes: 52 selectable options <br />volume: 4 level adjustable levels (25db to 110 db) <br />receiver power: ac 110v(us) ~ 220v (eu,uk,au) <br />transmitter power: 1 x 12v alkaline type a23 battery</p> </p> <b>box includes:</b><br>1 x push button (transmitter) <br> 2 x plugin chime (receiver) <br> 2 x screws <br > 1 x double-sided adhesive tape<br > 1 x 12v a23 alkaline battery for transmitter<br> 1 x user manual <br>