PEN Modem 3G/4G USB and/or Wi-Fi

Selling a 4G PEN Modem/Router that operates via USB and/or Wi-Fi. Compatible with all national and international mobile networks. Operates in any of the following ways: - Connect directly to the PC's USB port (tested on Windows and Linux); - Connect to a USB power source (e.g., power bank, mobile phone charger, car USB port) and connect via Wi-Fi (any device); I can arrange a hand-to-hand transaction in Lisbon or Alentejo (Beja), or somewhere along the route between these locations. "Negotiable" means I am open to exchanging it for something that may be of interest.