TECKNET Self-Powered Wireless Doorbell Plug in Cordless Door Chime Black/White With Code

The TECKNET Wireless Doorbell Kit comes with an AC plug that won't tie up your plug; the self-generating transmitter automatically generates power when pressed and sends a steady signal to the receiver. Suggestion: Do not use electrical appliances (especially electrical appliances larger than 2000W) for a long time on the doorbell.

IP65 WATERPROOF PUSH BUTTON
This IP65 Rated transmitter with waterproof ring seal operates between -20°C (-4°F ) to 50°C (122°F ) and withstands various adverse weather conditions. No worry to install it anywhere inside or on the outside of your door frame or in the garden.