"OS6250-24 Fast Ethernet chassis with AOS Enterprise software. Provides 24 RJ-45 10/100 BaseT. 2 SFP/RJ45 10/100/1000 BaseT or 100/1000 BaseX combo and two dedicated 2.5G HDMI stacking ports. 1U by 1/2 rack form factor. Internal AC and optional external backup power supply. Includes country specific power cord. manuals/software access cards. RJ-45 to DB-9 adaptors and brackets to rack mount with another OS6250. Optional single unit 19"" mounting kit: OS6250-RM-19-L or OS6250-RM-19"