The Siemens Gigaset M665 T PVR features an internal hard disk on which users can record their programs and replay them whenever they want. The key features of the device are listed here:

* Twin tuner: Able to record two simultaneous program
* HDD integrated (80 Gb)
* PVR functionality (like timeshifting, one click recording)
* Convenient On-Screen-Display (OSD) for ease of use
* User interface (Spanish and English)
* Intuitive user interface (e.g. installation guide, channel lists)
* Sincroguía TV ® featured by InOut
* Extended EPG information updated constantly over the air (OTA)
(SincroguíaTV ® until 01/01/2009)
* InOut service features (like synchronized recordings and automatic recordings by genre)
* Teletext (incl. subtitle)

A few more technical data are listed here: Siemens Gigaset M665 T PVR