Xhorse VVDI BE Key Pro (Improved Version) V4.1T PCB (also called VVDI BE Key / Benz BE Key board).
Shape: Custom outline that fits into Mercedes-Benz-style key shells (typically 3- or 3+1-button housings).
Components visible: Central microcontroller, multiple tactile push-buttons (white and black), SMD resistors/capacitors, crystal, RF/IR-related parts, QR code, and mounting holes.
Functions: Supports both 315 MHz and 433.92 MHz frequencies (switchable via software on a VVDI MB tool or by adding/removing a small SMD resistor on the board). It handles remote locking/unlocking, trunk, and immobilizer/transponder functions for many Mercedes models (non-keyless-go in many cases).
Typical use
Automotive locksmiths and technicians program these boards with Xhorse VVDI MB tools to create working spare keys for supported Mercedes-Benz models.