1, Real sine wave output; 2, Strong capability for different; 3, RS232 Features:* Real sine wave output; strong capability for differentload.* Smart RS232 ... Wide input range and accurate output; AVR.* Protection for overload, short circuit, over-voltage,low-voltage, over ... -starting when main power recovered.* Protection for over charging due to intelligentbattery management. Sine Wave off-line UPS