Electric & Gas Jet Surfboards

Paperless conference system and applications The paperless conference system is a part of the paperless conference interaction system. It is a new generation of conference system running on PC and tablet computers. It uses modern communication technology, audio technology, video technology and software technology to realize paperless conference through electronic exchange of documents. Ⅰ. The paperless conference system includes the following features File transfer network, file display electronic, file editing intelligent, file input and output controllable. The paperless conference system adopts a brand-new conference mode, which virtualizes all links in the traditional conference process, digitizes the main body information and the carrier medium, integrates a variety of information technologies into all links of the conference, runs through the entire conference process, and brings frequent meetings to IOS and Android platforms, and conference users complete more tasks in a shorter

  How to Choose an Effective PA System Whether or not we realize it, PA (public address) systems are ubiquitous in everyday life. Retail stores, bars, restaurants, art galleries, schools, gyms, houses of worship, airports and music venues rely on PA systems to deliver music, speech, and other audio. Some systems are small, perhaps even hidden; other PA systems are built like virtual walls of sound intended to blast audio to millions. The Grateful Dead’s 1974 “Wall of Sound” is an iconic example. The Dead’s concert PA system included hundreds of speakers tethered together to produce over 25,000 watts of power. This was certainly a far cry from a 1920s-era Magnavox PA system capable of only 10 watts. “PA system” is a nebulous term that can include speakers, inputs, amps, preamps, mixing boards, etc., — whatever delivers live or recorded signals to an audience. PA Speakers and Subwoofers Speakers are the most prominent part of every PA system. They take electrical signals from an amplifie