One key VLAN: When the mode is turned on. different VLANS are isolatedfrom each other for communication Can divide . For multiple VLANS, it can effectively suppress problemssuch as stuck and unsmooth caused by Broadcast storm. 250 Meter Long Distance Extension: Supports one click extension function , with a maximum transmissiondistance of 250 meters . Stable and smooth data transmissionfully meeting the needs of security monitoring networking. No Power Required: Supports IEEE802 . 3af / at / bt ( POE / 90W ) input , can cascadeoutput multiple times , wiring is simple and fast , andpower supply is stable and reliable. Fewer Cascaded Wiring: No need for external power supply , only one network cableconnectiontwo devices connected in series with a maximumtransmission distance of 100 meters IP55 Protection Level: Adopting a high weather shell , providing IP55waterproof capability , at temperatures as low as-10'cIt can work normally even in harsh environments up to55C . without fear of wind . sunlight rain or snow Material: plastic colour: White Package Contents: 1 x POE Extender(100Mbps) 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.