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Comparison Defender Quadro Promt vs Ginzzu GR-487U

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Defender Quadro Promt
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Product typeUSB hubUSB hub
Placementexternalexternal
InterfaceUSB AUSB A
USB version2.02.0
Hub connectors
USB А47
USB A version2.02.0
More features
Switchper port
External power supply
Removable USB cable
Cable length82 cm10 cm
Activity indicator
Materialplastic
Color
Added to E-Catalogjuly 2016april 2014

USB А

The number of USB inputs located on the case of the card reader or hub (see "Type"). The number of USB ports that you will have at your disposal after connecting the device depends on this parameter. "Pure" card readers and combined models, usually, have 1, 2 and even 3 USB inputs, while hubs have 4 or more ports.

Switch

The presence of a switch that allows you to turn off the power supply to the USB ports. This function can be implemented either by one common switch for all ports at once, or by personal buttons for each port.

External power supply

External USB devices require power to work, which is supplied to them through the same USB port. However, the power of such power supply is relatively low (especially in version 2.0 ports, see "Connection"), and if several external devices are connected to one port of the computer through a hub, a situation may arise when the power is not enough for their operation. Connecting an external power supply to the hub allows you to avoid such situations: the hub receives additional power from the network and supplies power of the appropriate power to each of its inputs.

Another option for using devices with this function is charging portable equipment via USB: some models can work as stand-alone chargers that do not require connection to a computer.

Removable USB cable

The ability to disconnect the cable from the device through which it is connected to the USB port of the computer (see "Connection"). This gives a certain convenience during transportation — a removable cable is somewhat easier to lay than a non-removable cable, you can carry it separately, etc. In addition, it becomes possible to replace the cable — for example, if the regular cable is not long enough, or if it is damaged.

Cable length

The length of the cable supplied with the device. Mostly relevant for models with a non-removable cable that cannot be replaced.

Activity indicator

Light indicator, indicating that data is currently being exchanged between the memory card and the computer to which the card reader is connected. This allows you to avoid disconnecting the card reader during operation, which is fraught not only with data loss, but even damage to the device.

Material

The main material used for the body of the device.

— Plastic. Plastic is light, cheap, quite practical, incl. has good strength properties. In addition, it allows you to create cases of complex shape and almost any color.

Metal. As a rule, aluminium-based alloys are used for metal cases. Such cases are much stronger than plastic ones, and also have a stylish appearance. On the other hand, in terms of impact protection, this material has no advantages over plastic, but it costs more, and it can weigh much more.