Abstract: An electronic payment device is disclosed which is portable and makes use of existing wireless connections for data transfer. The device described herein makes it possible to obtain information from different data sources such as credit cards with magnetic stripe. The device incorporates anti-manipulation means which detect any improper or unauthorized access to the device, so that a circuit which is connected to the central unit and powered by the system supply device or an auxiliary system is monitored to determine that the circuit is closed and not altered in any way, which would occur on attempting to access the device as the fine thread mesh comprising the flexible circuit would be affected by an unauthorized or forced access.