... sound,use battery,30-50M remote range,OEM wireless door bell,digital doorbell,door chime,factory low price,flashing while music sound,use ... W.: 19.5KGS20": 197CTN,23,640PCSRemarks: We,SHENZHEN QIYAO PLASTIC & ELECTRONIC CO.,LTD are a professional manufacturer in a wide range ... of Audio,Electronic and Digital devices in Shenzhen,China. All our products ...