Home Wireless Doorbell No Need Battery Self Generating Electricity Button Kids Craft Kits ITEM NAME:2x Non-Slip 4mm Yoga

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12V---48RPM

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Small size after deflation

Home Wireless Doorbell No Need Battery Self Generating Electricity Button Kids Craft Kits ITEM NAME:2x Non-Slip 4mm YogaITEM NAME: Home Wireless Doorbell No Need Battery Self Generating Electricity Button img *{margin: 0; padding: 0;. Then the wireless module of the button sends the signals to receiver. The receiver receives the signals and plays music react. 1 x bell paster. No battery need and no wire The product is easy to install.