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Overview: Meeteasy ® Mid EX is expanded on the Meeteasy? Mid basis by connecting 2 additional external high sensitive microphones. The audio port and USB port can be connected to computer to support Internet conference. 18 participants are recommended for conferencing. Ports: • RJ11 port for PSTN and analog PBX connection • 3.5mm audio input/output port • 4P4C port for wired extended microphones • USB port Speaker: • Response frequency: 200-4000Hz • Volume: max. 89db MIC of main part: • Response frequency: 200-4000Hz • 1 built-in omnidirectional microphones, 4 meters away speaking can be clearly heard Accessories: • 2 wired extended microphones, 4 meters far away talking can be clearly heard Features: • Support Internet conference application through computer and 3-party conference through hybrid PSTN and Internet network. • Digital echo cancellation technology applied, full-duplex and hand-free conversation • Dynamic noise reduction technology applied • Hi-fi speaker with volume adjustable • Microphones mute function • Expandable to 5 high sensitive microphones (Mid2 EX), that ensure larger-scale meeting and protect your investment • Handset conversation function • 16 digital Incoming/dialed call numbers can be displayed and stored, compatible with FSK and DTMF signal • LED indicator for missed call • LCD with backlight • Laser carved lightening keypad for operation in the dark • 8 ring tones plus 1 additional VIP ring tone, ring tone can be played and selected • VIP number function with deleting-prevention, special ring tone for VIP call • Hold function • Flash function Power: • 85-265V 50/60Hz AC Working Environment: • Working temperature: 5°C-40°C • Relative humidity: 20%-85% (non-condensing) • Storage temperature: -30°C-55°C.