SourceTon Collapsible Cross Design Silicone Trivets in Cute Colors, Silicone Pot Holder Motion Will it work through walls

Will it work through walls

Battery operated with 2 AAA batteries (not included)

the screen will be red or green

5 different colors to choose from

Note: Adapter is not included

SourceTon Collapsible Cross Design Silicone Trivets in Cute Colors, Silicone Pot Holder Motion Will it work through wallsHEAT COLD ISOLATING: Protects your kitchen counter top and table from heat cold damage. NOTE: COLOR may various. Key Features NON STICK AND NON SLIP: FDA approved food grade silicone, heat resistant up to 500 F, safe for ovens, microwave ovens, dishwashers and freezers. MINIMUM STORAGE SPACE: Easy To store and clean: fold up, hand wash or dishwasher. MULTI PURPOSES USAGE: Use for dinner table kitchen hot dishes, pan, pot, bowl, also can be used for