The wearable device 'lovely' can link with your phone and could improve your sex life. It measures top speed and calories burned and could revolutionise your sex life.

The one-size-fits-all gadget keeps an eye on your top speed, number of thrusts and even calories burned during sex sessions.

Named Lovely, it has built-in Bluetooth and uses the data to recommend 120 different positions to keep things steamy in the bedroom.

It is designed to fit snugly onto a penis but also vibrates and has a battery that lasts around seven hours.

In a promotional video, Reid Mahalko, a sex and relationship expert, said: "It doesn't just have to go on a penis.”

"You can put it on your fingers, you can use it on a toy on yourself.”

"It's really only going to be limited by the ideas that you come up with."

It also comes with a charging station and dual LEDs.The gadget is currently raising money on crowd funding site Indiegogo.