PowerSure Interactive models are a line interactive design with a sine wave output. Suitable for mission critical, networked servers and high-end POS systems. Each unit is provided with a 6-foot input cord. Auto sensing 50 or 60HZ input and output; UPS automatically senses the input frequency. Input and output noise suppression, a PWM bi-directional converter, computer interface DB9F connector, Intellislot communication port, buck and boost voltage regulation, user replaceable batteries, multiple output receptacles, over-current protection devices.