Profile: Liebert Corp. designs a self-contained system that controls air temperature, humidity & cleanliness in a computer room to tolerances of +/- 1 degree fahrenheit & +/- 2.5 percent relative humidity. We specialize in applying refrigeration technology. Our powersure PSP-60Hz features four battery backed UPS outlets with spacing to accept transformer blocks and user replaceable hot swappable batteries. We design liebert IP telephony availability system-60Hz, which brings data center-level power protection to network edge equipment in remote access points, such as branch offices, retail stores & other locations and supports stackable switches & routers.