Abstract: The present invention relates to an externally worn transducer module (1) for use with an implant (101), which module (1) comprises: —a transducer (5) for converting energy into electrical signals, —a wireless interface (19), configured to transfer data signals to and/or from the implant (101), and receive electrical power from the implant (101), —circuitry (8) operably connected to the transducer (5) and interface (19) configured to: —receive electrical power from the interface (19), —convert electrical signals generated by the transducer into data signals responsive to the electrical signals, and —provide data signals to the interface (19), and —housing (2) that forms a protective body of the module (1), which housing (1) is configured for external attachment to the body of the wearer. It particularly relates to a microphone module for use with a hearing aid implant. It also relates to a kit comprising the module and optionally comprising the implant, and tools for user insertion and maintenance.