1. Easy to use, plug and play, no configuration required, just plug in cable and you can use it. 2. Built-in professional PoE chip automatically identifies PoE access devices. 3. No power supply required, port is powered, the wiring is simple and fast, and the power supply is reliable and stable. 4. Two devices can be connected in series with a maximum transmission distance of 250 meters, and less wiring. Support IEEE 802.3/802.3u,IEEE 802.3af/at Support 250M Extend function 2*10/100Mbps self-adaptive RJ45,support(Auto-/MDIX) 1*10/100Mbps self-adaptive RJ45 (Auto-/MDIX) Support 1K address Support EEPROM Support IEEE802.3 af/at All ports supports 2KV -protection Support 16 VLAN(IEEE Std 802.1q) Support maximum forwarding packet length 2048 bytes Due to different product batches, the appearance , which does not affect the use. Colour:As Shown Material:Plastic Package Contents: 1 * Poe Extender 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.