Designed for rack-mount or tower application. Base 1000-3000VA models are just 2U high. The 5kVA and 6kVA, 4U models; and 8kVA and 10kVA, 6U models. All models are available with output of 120/208V. Please note that the internal batteries for the Liebert GXT3 5kVa to 10kVA UPS must be ordered separately, and will ship separately. Depending upon the model you select, there may also be a separate POD required.