RJ45 network port is plug and play. It is in line with IEEE802.3at protocol. It is made of good quality material, durable to use. The length of this product is 16cm, the width is 1cm and the height is 1cm. They are suitable for WLAN, routers, switches, internet telephony, security monitoring, etc. Item Name: POE Adapter Material:PVC Transmission Distance: 30m Network Cable High-speed Transmission Cable Length: 16cm Size:16cmx1cmx1cm/6.3inx0.39inx0.39in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. The product needs to be used with a splitter and a combiner. The transmission distance is limited to 30m. If the switch voltage is greater than 15v, please lower the voltage before using this product, otherwise it may burn out the camera and other load equipment. Package Includes: 1 X POE Combiner 1 X POE Splitter