Features:  - It supports IEEE 802.3af/at standard, automatically detects and identifies power receiving equipment (PD) conforming to IEEE 802.3af standard and supplies power to it.  - The output power of the built-in power supply can reach 83w, and the power of single port Poe can reach 30W.  - It supports IEEE 802.3x full duplex flow control and backpressure half duplex flow control.  - Provide 9 * 10 / 100M adaptive RJ45 ports, including 8 * Poe ports and 1 * uplink port.  - Each port supports MDI / mdix automatic turnover and self negotiation.  - Plug and play, no configuration, simple and convenient.    Specifications:  Network standards:  IEEE 802.3、IEEE 802.3u、IEEE 802.3x、IEEE 802.3af、IEEE802.3at         Ports;  9 * 10 / 100Mbps RJ45 port, among which 1-8 ports support Poe function;  Indicator light:  Each device has a power indicator;  Each port has a Link / Act indicator;  Network media:  10Base-T: unshielded twisted pair of Category 3, 4 and 5 (≤ 100m);  100Base-tx: unshielded twisted pair of category 5 and above (≤ 100m);  Performance: Store and forward;  External dimension（L x W x H）: 216*131*30mm;  Input power supply: Built in power supply, maximum output power 83W;  Usage environment:  Working temperature: 0 ℃～ 40 ℃;  Storage temperature: - 40 ℃ ~ 70 ℃;  Working humidity: 10% ~ 90% RH, non condensing;  Storage humidity: 5% ~ 90% RH, non condensing;    Package Includes:  1 * Switch;  1 * Foot pad;  1 * Power adapter;  1 * Installation manual