The length of about 55CM， the packaging 1M4 mean of 1 points 4 interface does not mean length

The USB extension. The current supply of each port to 500mA current.

- support USB1.0/1.1， USB2.0 compatible， at speeds of up to 12Mbps

- support Win95/98/ME/2000/XP， Linux2.4andMac os8.5 or above version

 

- it can simultaneously support multiple USB extensions， such as camera， mouse， keyboard， computer desk lamp， MP3， recording pen