Easily avoid duplicate wiringOnly one network cable can transmit three camera signals,No wiring is required to increase points in the later period, and the constructiond is simple and cost-saving. Intelligent detection does not burn equipmentPD detection function of standard protocol automatically identifies the power receiving equipment. If it does not meet the requirements, the power supply will be stopped or the non-power receiving equipment will only retain the data exchange function of switch. Industrial design aluminum alloy housingThe strength of the shell, heat dissipation more to adapt to more harsh environments, to the stability of the transmission Colour:Black Material:Aluminum Alloy Package Contents: 1 x PoE Extender(Due to different product batches, the appearance , which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.