Chennai: Keerthana Chilukuri and Bindhu Upadhyay, second year students of the Engineering Design Department of IIT-Madras, have come up with an idea to locate the misplaced objects using bluetooth technology and mobile phone. The items like keys or specs, which we misplace often, are to be tagged with a bluetooth module, each of which has a unique code. The students, who were working on the device dubbed Blutag since April, have written a code for a mobile application. When we need to locate the object, all we have to do is specify which object you are looking for and the application searches for the unique code of the object and connects with the bluetooth module, which would then beep and glow to reveal its location. Other similar products like the keyfinder are available in the U.S., but they all need a remote, which tracks down the object using a particular radio frequency. There are security issues in the use of these products such as the loss of the remote and anybody with a remote with matching radio frequency can get access to the objects. "The unique code in bluetooth technology makes it much more secure and we are more likely to not lose our mobile phones than a secondary device like the remote," said Keerthana. "The device is tiny and handy and useful to common men. Even people is rural areas should be able to use it as they too are familiar with bluetooth mobiles and this will enable the lost objects to be found within a radius of 10 metre," said Bindu. Blutag is a spirit of engineering (SOE) project developed at the Center for Innovation on the campus. The SOE project has been displayed at Shaastra, the annual technical festival of IIT-M.