The South Korean buses powered by an electric road

A South Korean city becomes the first to power buses by using an electric road, chat app Whatsapp adds the ability to send voice messages and a luxury toilet controlled by a smartphone app is vulnerable to attack according to experts.

BBC Click's Marc Cieslak looks at these and other tech news stories.

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.