EQUES Small Black WI-FI Motion Detection Door Viewer is affordable and serve the function however you need to charge the door viewer every 2-4 days depend on the motion detection

We will provide a 3meter wire for you to charge the doorbell as other cheap electronic door bel will require you to take down to replace the battery which will cause the connector to spoil easily

Highly recommended from My Digital Lock with local warranty by Singapore Distributor