There are no number keys on the front. You cannot change the frequency via the keypad. You must buy a programming cable.
Baofeng BF-88E is a license-free PMR446 radio designed specifically for the European market Baofeng Bf-88e Programming
Use the programming software to lock out (disable TX) on frequencies you are not licensed for. In CHIRP, set "Duplex" to "off" for receive-only channels. There are no number keys on the front
Before diving into software, you must understand what the BF-88E is and is not. Baofeng Bf-88e Programming
Allow Windows to install the necessary drivers. Verify the connection in the "Device Manager" under "Ports (COM & LPT)" to identify which COM port has been assigned.