1. Over-voltage protection. Under-voltage protection. Over-current protection 2. Automatic recovery. Voltage display(voltage measurement). Current display (current measurement) 3. Voltage calibration: Voltage +-10% adjustable. A13 4. Restore factory settings: press the button for more than 12s 5. Fault inquiry: Press the UP button from more than 12S Product Parameters: 1. number:TOWJR-2 2. supply:230VAC 50/60Hz 3. Over-voltage protection value range:240V~300V~OFF Over-voltage recovery voltage range:245V--305V Over-voltage protection action time:0.1s~30s(default value:0.5s) Over-voltage recovery delay time:1s~400s(default:30s) 4. Under-voltage protection value range:120V--200V --OFF Under-voltage recovery voltage range:125V--205V Under-voltage protection action time:0.1s~30s(default:0.5s) Under-voltage recovery delay time:1s~400s(default:30s) 5. Over-current adjustment range:1-40A Over-current action range:0.1~30 second (default:0.5s) Over-currentrecovery delay time:1s~400s(default:30s) 6. -on delay time:1s~400s(default:10s) 7. consumption : Less than 2W 8. Electric machinery life : 100,000 9. Installation:35mm DIN rail Type: Voltage protector color:As shown Material:plastic Package Contents: 1 x adjustable voltage protector(40A) Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.