it is not that bluetooth is faster or slower than infrared, it depends on the devices involved in the file transfer and not on the infrared or bluetooth, for eg. sending files over bluetooth in LG cellphones requires more time than sending files over IrDA in sony ericsson. i just need a circuit which can receive file via bluetooth and send it via IrDA or vice versa, it dosent matter to me even if the circuit starts sending the file after the receiveing is completed. anyways, thanks for your response.