Product Name: Ht-3020 Series Multifunctional Digital Audio & Video Conference System Embedded Microphone Model NO.: HT-3020c/d Color: Black Pointing Feature: Cardioid Communication: Wired Composition: Microphone base + Gooseneck Microphone Video: Video Type: Video Conferencing System Connection Type: 8 Pin Video-Tracking: Support Voting: No Built-in Speaker: No Trademark: HTDZ Transport Package: Carton Origin: China Product Description We have over 20 years expreience in the design and manufacture of conference system equipment.* Operate a 10,000sqm factory.* We are not only selling products, we provide solutions service.* Integrating research, production, sales and service.* 6 major product series and 1,000+ models.* Support OEM & ODM service.Conference chairman microphone & delegate microphone HT-3020c HT-3020dBasic parameter:Frequency response: 40Hz-16KHzSensitivity: -44 dB±2dBReference sound receiving distance: 20~120cmDimension: 245x140x48mmInstallation Dimension: 207 x 75mmLength of gooseneck:420mmSupport discuss & video-tracking:-HT-7000D / HT-3300 main unit to support discuss function.-HT-3300T main unit to support discuss & video-tracking function.Newly digital designThe system power supply for all the delegate units is provided by the main unit at 24 safe voltages.With 8-PIN T-type hand-in-hand interconnection cableLCD displayElectric capacity type microphone.Extended pipe optional.The annular red indicator lamp could show the state of the microphone.The chairman unit number in the system is unrestricted, can join in any position of the system.Chairman can turn off delegate MIC by priority button,Indicative sound for chairman unit (optional)System Connection Diagram (For example):1. For discuss function only2. For video tracking & voting functionsWe are looking forward to receive your inquiry if you had interest in this product, for more details please do feel free to contact us!