wireless doorbell 1200 feet waterproof doorbells for home with 36 melodies 4 volume levels, flash led light (1 receiver&1 touch button white) jsieem <b>d-157 wireless doorbell:</b><br><br> <b>plugs into any standard wall outlet: </b><br> easy to install and operate, it plugs into any standard wall outlet. use it for front, side, or back doors to gain security and peace of mind. <br><br> <b>4 volume levels</b><br> you'll be happy to know that you have the option of turning the chime down or up--a great option for different environment. <br> <br><b>1200 feet operating range: </b><br> thanks to its industry-leading 1000-feet working range, you'll be sure never to miss a visitor's arrival no matter where you are. <br><br> <b>choice of 32 chimes: </b><br> this unit lets you choose the best way to be notified when someone is at your door. in addition to your choice of 32 selectable chime tunes. <br><br> <b>flashing light indicator: </b><br> the flashing light indicator that gives you a visual form of notification(an excellent feature for the hearing impaired). <br><br> <b>specifications: </b><br> receiver voltage: 110v ac<br> battery: cr2032 3v battery<br> power consumption: <0.5w<br> volume: 65-110db<br> range: 1000ft in an open area<br> frequency: 433.92 mhz ± 200khz<br> operating temp: -4°f~140°f (-20°c-55°c) <br><br> <b>package includes: </b><br> 1x receiver<br> 1x transmitter<br> 1x user manual<br> mounting hardware<br><br>