We've all experienced that terrible feeling of panic when we've "left" our wallet somewhere.
But worries about lost money and cards could be a thing of the past, thanks to a "smart wallet" that includes a chip so it can be easily tracked.
It's the SmartWallit Pro, an electronic card that accompanies the wallet everywhere, preventing it from being lost or stolen.
The flat Bluetooth device is just 4.2 millimeters thick, is credit card-sized so it can be placed in the corresponding pockets in the user's wallet, and is powered by a rechargeable lithium-ion polymer battery.
The gadget works via an app with iPhone, iPod Touch and Android devices. If your wallet goes out of range of the app, a warning message will flash on the screen, showing the last location where the wallet was used.
According to its inventor Jack Hu , the Smart Wallit card also has other functions such as: Informing its holder about how many times it has been used, the amounts spent each time, and the purchases made.
In this case, the mobile phone and the wallet go hand in hand, which also means that if the user forgets the wallet, the mobile phone notifies him, while if the opposite happens, the wallet notifies that the mobile phone has been forgotten.
The Smart Wallit Pro is expected in March this year and retail prices will be around £36.
