KEEO Carbon is an innovative and interactive key holder. With one push of a button it makes the right key pop out and also lets your smartphone know where it is. Losing KEEO Carbon is nearly impossible: the iOS and Android app allows KEEO to communicate with your smartphone through the new and energy-saving Bluetooth® Smart technology. KEEO Carbon holds three regular household keys on the inside and as many keys as you like (e.g. bulkier keys such as your car key) on the outside loop. Thanks to the PLUG'N'SCREW system, your keys can be installed simply without any modification to them.