The SIMATIC RF350M mobile handheld terminal consists of a basic unit (Basis Nordic ID Merlin) and an integrated read/write device for RF300 transponders and transponders of the MDS D-family according to the ISO15693 standard. The read/write device is equipped either with an integrated antenna or with a socket for connecting external antennas.

The SIMATIC RF350M has a splash-proof enclosure (IP54), a color QVGA color touchscreen with a resolution of 320 x 240 pixels, TFT portrait format, an alphanumeric keyboard and various interfaces e.g. for SD memory cards, battery charging and WLAN.