Calling it the ‘Smart Bell’, it will actually call your handset whenever someone rings on your doorbell, letting you hold a conversation with whoever is at the door. Neat! Just make sure that you have roaming turned on and are prepared to pay obscene roaming charges if you’re overseas, but otherwise, this is the perfect out-of-town solution if you do not want to be thought of as being away.
Apart from that, the doorbell comes in pretty handy to assist delivery workers in completing their deliveries. Rook has already sold 20,000 units to communications firm Commtel Innovate, and might see him sell another 25,000 more to an unidentified firm, making him 250,000 pounds richer in the process.