RW: Mobile GSM-R Modem

Technical Specifications:
- Connectivity: Bluetooth 4.0+ (low energy)
- Compatibility: Works with Android/iOS smartphones & tablets
- Networks: GSM-R (voice, data, SMS)
- Battery Life: Extended operation (varies by usage)
- Portability: Compact, lightweight design
- Use Case: Adds secure GSM-R functionality to consumer devices