DMT-20 Stereo Digital Microphone Decoder Test Box is a professional CODEC decoder digital microphone, outputs stereo audio analog signal to microphone measurement and analysis equipment. No need to update the original measurement software or equipment, reduce testing costs.

This is a XENYX 1202/1002/802/502 mixer user manual, which mainly introduces the features and characteristics of the mixer, including input and output terminals, operation components and interfaces, installation and other content

4E1 PDH Optical Terminal User Manual, the main functions and features include: providing 4 E1(2.048Mbps) transmission capacity, providing unbalanced BNC interfaces; providing 4 E1 business ports, full digital clock recovery and smooth locking technology; providing RS232 network management interface, supporting unified network management; dual power supply, hot backup, optional AC220V, DC48V; provide perfect local/remote alarm monitoring, three-color indicator; support local/remote E1 branch loop; provide one public telephone; provide transparent RS232 data channel, the speed is 300-19.2Kbit/s.

VK-3801A/VK-3801B is a digital MP3 player that uses the world's most advanced microcomputer control, MP3, and FLASH recording technology. It integrates advanced functions such as broadcast auto-play, audio source selection, audio and microphone recording storage, recording download, and programming. The high standard product positioning and multi-functional advanced design make it a masterpiece of broadcasting equipment, reaching the domestic leading level. It is widely used in campus automatic broadcasting music ringing, foreign language broadcasting teaching listening test system.

NFS-3030 is a large capacity intelligent fire alarm control panel that supports ring, non-ring and T-shaped wiring. Each loop can connect up to 159 detectors and 159 modules, a total of 318 addressable devices. Each controller has a maximum capacity of 3180 addressable points.

Targus Desktop USB 2.0 7-Port Hub with Audio Pass-Through allows you to expand your desktop by adding 7 additional USB ports with over-current protection, and audio pass-through ports for easy connection of headphones/speakers and a microphone. It also features High Power technology, Targus Always On technology, and Targus Easy Access Ports.