Energy-efficient monitor with 1.7 "inch screen capacity2. Receiving incoming calls from the door communicator3. SIP v2.0 protocol-based two-way connec..
Capacity:Extension port is 16-88 lines,trunk port is 4-10 lines, Max port total capacity is 92 lines(4 Co lines 88 Exts) or 82 lines(10 Co lines and 7..
The smart energ Plug in switch enables setting work time for appliances with regard to your needs.Voltage, Current, Power factor, Instant power wattag..