4-inch OLED screen, display voting results, volume, microphone status, power state, WiFi status, etc. Built-in rechargeable lithium battery, battery capacity 10000mAh, continuously speaking for more than 8 hours 128-bit AES digital encryption technology, WAP / WAP2 security connection, MAC address filtering, hidden SSID, prevent eavesdropping and unauthorized access High directive microphone, with windproof cover, with LED indicator ring, speech for red, wait for green D325 is chairman microphone, with first priority button Using a low-delay technology, minimum delay is less than 20ms 48K sampling rate, digital control, high quality of audio transmission

Adopting network protocol transmission, not compressed Powered by system host or normal switch Front panel with 2.9 inch LCD screen display With 3.9 inch LCD nameplate With audio output interface and volume adjustment The participant information and background could be edited Connected via network cable Chairman mic with priority function

Voting Delegate microphone Sign-in function. Chairman mic with priority Powered by POE48V

Speech, sign-in and voting function (D625/D626) 2.1 circular LCD touch screen (D625/D626) With microphone output dual backup function With 3.5mm stereo headphone jack for monitoring Adjust the microphone volume independently With a unique ID for each conference unit 3 sets of theme UI, switched freely Used with a camera to realize automatic camera tracking The chairman unit has the priority function

With microphone output dual backup function With 3.5mm stereo headphone jack for monitoring Adjust the microphone volume independently With a unique ID for each conference unit 3 sets of theme UI, switched freely Used with a camera to realize automatic camera tracking The chairman unit has the priority function

D6223 Desktop Chairman Speech Unit provides functions such as speech, check-in and self-checking. It adopts goose-neck microphone, built-in magnetic loudspeaker, headphone jack, and also provide power-on indicating light and button and light indicators.

In VOICE mode, this chairman microphone can realize voice controller on/off function. It has high speed digital processors and HiFi audio circuits, and can indicate the work status of LCD screen. Chairman unit has the priority to deliver speeches and the authority to approve speech application from delegates. It has the full authority to take control on the discipline at the conference site; in a D62 series digital conference system, it allows 2 chairman units at a same time, and the position of chairman units is free from position restrictions. Conference units are passive equipment and are powered by the controllers. The chairman microphone input voltage is 24V; they are easy to use, with clear voice and easy to install with fashionable appearance.