Northstar AVR Servo-Type 1000 Watts NSR-1000SV compared with other voltage stabilizers, it has the advantage of great variety, complete specification, nice appearance and obvious features of high efficiency, no wave distortion, reliable performance, working continually for long time. Moreover, it is provided with short time delay and over voltage protection, the long time delay and under voltage protection also can be set according to user requirement. This product is an ideal stabilized voltage supply, widely used in any locations requiring electricity and ensures your power device can run normally.