HIMS Braille Sense U2 User Manual page 356

Connecting service: Enter on the service name
Disconnect service in Bluetooth service list: Enter-d (dots 1-4-5)
Move to Bluetooth device list in service list: Backspace
Remove device setting in Bluetooth device list: Space-d (dots 1-4-5)
1) FTP service
Open local folder/move remote folder: Enter-o (dots 1-3-5)
Copy: Enter-c (dots 1-4)
Paste: Enter-v (dots 1-2-3-6)
Send to: Enter-s (dots 2-3-4)
Retrieve file: Enter-r (dots 1-2-3-5)
New folder: Enter-f (dots 1-2-4)
Delete file/folder: Space-d (dots 1-4-5)
Information: Enter-i (dots 2-4)