Portable wireless door chime. Wireless push button included (RPWL200). Four chime tunes (Ding dong, Fantasia, Westminster, Smart Saxophone). Three volume levels. 150-ft range. Individually coded push button to avoid interference with other users. Works with up to four door bell pushes. LED feedback on door bell push. Easy installation. Battery operated 3 x C type (not included). 1-year warranty.