Tablet Cases and Handheld PC Add-Ons

Tablet and handheld cases: exact model and generation

Most of the accessories here are covers, cases and sleeves for tablets, each listed against an exact device, such as an 11-inch iPad Pro from 2018 or an 11.6-inch Android tablet. Tablet generations change camera, button and port positions, so a case for the wrong year can block them. Read the Compatible with line and match it with the model number on your device. Pay attention to the finish, since clear cases show the device color, and look for stands and straps if you want hands-free use.

Industrial add-ons: PoE, SFP media converters and temperature rating

Some products here are network and industrial parts. Power over Ethernet standards matter: IEEE 802.3af supplies up to 15.4 W per port and 802.3at up to 30 W, and a powered device must stay within what the source provides. A media converter with a 1 Gbit/s SFP port and an RJ45 port links fiber to copper, and its SFP module must match the fiber type and wavelength at both ends. Indicator lights for link, optical signal and power help with troubleshooting.

Operating temperature ranges such as -40 to 60 degrees Celsius mark parts meant for outdoor cabinets and factories, while ordinary office gear is rated for a narrower range. Check how the unit mounts and what power supply it needs. A few listings are unrelated, such as drives, label supplies and rack power units, so confirm the product type before choosing.

Questions about Tablet Cases and Handheld PC Add-Ons

What does IEEE 802.3af/at compliant mean?

It means the device follows the Power over Ethernet standards that deliver power over the network cable. 802.3af supplies up to 15.4 W per port, and 802.3at, also called PoE+, up to 30 W, enough for cameras, access points and phones.

Can any SFP module go into an SFP port?

Physically most fit, but the module must match the speed, the fiber type and the wavelength at both ends. Some devices also accept only modules coded for their maker, so check the compatibility note.

How do I find my tablet model for a case?

Look for the model number on the back or in the settings, then match it with the generation and year in the case title. Screen size alone is not enough, because cutouts and thickness change between generations.