The present invention provides a wireless pulse oximeter for continuous use comprising a first device (10), adapted to a part of the body of a patient and comprising physiological data sensoring means, communicating with a second remote device (12) by means of an RF connection (11), said first device powered by a rechargeable battery (31), being provided with battery charge saving means by automatically shutting off the power from the circuits when this device is not installed on the patient's body. The second remote device is an intelligent terminal containing a display as well as a specific application for processing the physiological data captured by the first device and received by way of said RF connection.