OPTI-UPS was established in 1991. The company was under the ViewSonic group initially and independent later for higher brand value. In order to serve our customers with greater efficiency, OPTI-UPS has set up branch offices worldwide, which cover USA, Germany, UK, Czech Republic, Australia, Taiwan and Dubai, as well as logistic facilities in Holland, Czech Republic, Dubai and USA. OPTI-UPS works with two major business models, namely marketing distribution of the brand name "OPTI-UPS" on a worldwide scale and provision of customized OEM/ODM products for other brands. With 16 years of experience in the industry, OPTI-UPS is now an international brand, of well reputation, serving an increasing demand for power protection products worldwide. A wide range of audio and video equipment including video cards, splitters, switches, adapters, converters, cables and more.
Protect your laptop, mp3 player, cell phone, PDA or other electronic with a high-quality, stylish case.
A large assortment of HDMI, DVI, USB, IDE, Firewire, ethernet, composite, S-video, component, fiber cables and more.
A large variety of cameras and camera accessories - whether you are looking for a particular brand or just in a price range you can find what you need.
Headsets, microphones, phone cables and more keep you connected to just about any communication device.
Video cards, keyboards, extenders, servers, switches, RAM and more - Sewell has what you need to upgrade your system.
Find complete computer systems or the bare necessities to make your own barebones systems here.
Find accessories for all of the electronics you routinely use, like batteries, car accessories, gaming accessories, and more.
Pretty much any networking accessory and appliance under the sun can be found here including switches, cables, server racks, modems, routers, and more.
Printers, Scanners, Bar Code Scanners, and more can be found here to outfit your office with the basics.
You'll find uninterrupted power supplies (UPS), power cables, surge protectors, replacement batteries, and more here.
Whether its data that needs to be stored in one of our many hard drives, hard drive enclosures, flash drive, RAID, or some other storage solution, we've got it.






Connecting your TV to your PC is easy with this converter. In other words this converter takes your PC's VGA signal and makes it compatible with your TV's composite port (yellow RCA)...






Easily connect the VGA port on your desktop, laptop, gaming console, etc., to your TV with this one-piece PC to TV converter.






Get any computer with a USB port the ability to connect to the internet, make and receive voice calls, and send/receive fax with this simple USB voice/fax/56K modem.






Put your iPod's audio and video on a big screen TV with this simple and economic adapter cable.






This USB to Serial adapter is the easiest way to add a serial port to your computer allowing you to connect your serial PDA, GPS, cell, etc. to your laptop or computer.






If you need to convert any VGA or component signal into a digital high definition HDMI signal up to 720p resolution, this conversion box will do the job perfectly.






This BNC to VGA is perfect for security professionals and other applications for composite video signal to VGA signal conversion.






Connect single headphone outputs to TVs and stereo systems with the 3.5mm mini-stereo to dual RCA adapter. The 6-foot cable is enough for short distance connections.






Getting ready to start on a big Cat5e wiring job? This high-quality 1000 ft. spool of blue bulk Cat5e is in an easy pull box and ready for crimping.






Use this combination of a USB to Parallel adapter and mini-centronics adapter to connect an older HP LaserJet printer to a USB port.






Get your Wii and/or your PS3 on a VGA monitor or HDTV with this cable adapter.






Convert a standard 36-pin Centronics cable to a mini-Centronics 36-pin cable that some HP printers use.








