We're making workrooms for 16, 20, 24 or 30 persons.
| Lektor | Perfekt | Perfekt plus | Perfekt PC | |
| FUNCTIONAL PARAMETER | ||||
| Teacher's keyboard | portable | portable/ solid |
portable/ solid |
- -PC Computer |
| Individual students' desk | NO | NO | YES | NO(YES) |
| Publicizing built-in | NO | YES | YES | YES |
| Audio input | 8 | 8 | 8 | 8 |
| Set of function | full | full | full | expanded |
| Conversation groups | 2 | 2 | 2 | 2(expanded) |
| Work in pairs | YES | YES | YES | YES |
| TECHNICAL PARAMETER | ||||
| Microprocessor | NO | YES | YES | YES |
| Possibility of expansion | NO | YES | YES | YES |
| Software update | impossible | in service | in service | via internet |
| Headphones cooperation | professional or computer |
professional or computer |
professional or computer |
professional or computer |
| Warranty | 2 years | 5 years | 5 years | 5 years |