Rosewood finished wooden frame with raised beveled-edge brass with floral designSelect from 8 note Westminster or 15 other pre-programmed soundsAdjustable volume control to accommodate larger or smaller homesExpandable up to 4 doors total with purchase of three additional wireless pushbuttonsEasy assembly in 10 min without wiresWhite rectangular shaped wireless pushbutton included that uses one 3 V CR2032 batteryActive transmitter pushbutton and receiver chime "learn" process prevents interference from other wireless productsChime mechanism uses three "D" size batteries (purchased separately)Wireless range can vary from 20 to 300 ft depending on your home's constructionWood and vinyl siding are ideal, metal or masonry decreases the range