1. Designed in accordance to ISO and IEC914.2. Each main unit can support 70 units. The system can be extended to 200 units atmost.3. Suitable for different conference.4. Elegant configuration with full modern tinge.5. Support telephone meeting.7. Power supply: 110V/AC220V 50/60Hz8. Power consumption: 620W9. Support video camera auto-track function.10. Connection:---2pcs 13m main cable with 9P-DIN plugs.---9P-DIN socket for system connection.11. Installation: 19-inch frame12. Dimensions: 480X350X130mm producing area:China payment:T/T in advance, L/C at sight supplying capacity:300pcs/month