▶ With 4.3inch IPS color 800X480 touch display, that could be English
   language menu.

▶ There are four mode: FIFO, LIFO, C-ONLY and LIMIT, limit for number
   1 to 4 speech, also could be limited speech times from 99min 59s to
   1s.

▶ Max for 199 wireless microphone unit，Max 4 chairman unit.

▶ Wireless has video track, inside RS-485 and RS-232 port for camera，
    support PELCO-D and VISCA, only use more than one camera need
    for HDMI SEAMLESS SWITCHER 4 IN 1 OUT. Menu setting and
    computer software also can setting preset. Center control machine
    also could be finish video track.

▶ Each function one button choose, very easily operation.
▶ The frequency automatic tracking locking function without the
    frequency, out-of-the-box conference unit.

▶ Main machine built-in 20 group system communication channel, max
    for 5 main machine used at the same time.

▶ ONE-KEY frequency matching for all powered microphones, allowing
    for the scanning of lost wireless microphones at any time, with the
    ability to individually select and assign ID numbers and edit individual
    wireless microphones;

▶ Built-in advanced encryption communication algorithm, stop
    communication error and error can be caused by the fault.

▶ Automatic shutdown system functions, main machine power off, all
    wireless microphone unit will automatically shut down.

▶ With in the mobile phone electromagnetic interference technology.

▶ Built-in high-fidelity MP3 recording, up to 32G U disk, clear recording
    and convenient storage;

▶ The system is designed with an antenna box system. The antenna box
    and the host are connected by a special line, bypassing the barrier
    wall, with a line length of up to 100 m. The antenna box is hung in
    the venue, The effective wireless working distance of microphone is
    40m;

▶ The host has built-in date and time, and all microphones are
    synchronized to improve meeting efficiency with accurate time;