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智能學碼 ( 能使門鈴增加配套 ) Self Learning 自選32首和弦鈴聲 32 Polyphonic Sounds 250米超長接收距離 Extended Range of 250 Meters ( Subject to environment ) LED閃燈指示 LED Flash Light 大面板按鍵 ( 防水設計IP44 ) Water Proof Transmitter 接收器採用3 顆 AA ( 1.5V ) 電池 Main power for door bell : Battery AA ( 1.5V ) X 3PCS 按鍵採用 23A ( 12V ) 電池 1 顆 Main power for transmitter : Battery 23A ( 12V ) X 1PC
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