Features: 1. This monitoring relay can monitor own working voltage. 2. 8 kinds of rated voltages are adjustable, can apply to voltages in all regions of the world 3. The working status of the relay is indicated by the LED indicator 4. Ultra-small size and it is easy to install. 5. It is applied to mobile device connection control, causing accidents in equipment protection against reverse operation, normal/emergency power switch, preventing phase failure of power load. Specification: Condition: 100% Brand New Model: GRV8-03 Monitoring Terminal: L1-L2-L3 Power Supply: L1-L2 Rated Working Voltage Selection: AC220-230-240-380-400-415-440-460(P-P) Measuring Frequency Range: 50/60Hz Measuring Range: 176V-552V Voltage Threshold Range: 2%-20% (Rated Voltage) Unbalance Threshold Range: 5%-15% Voltage Fixed Lag Rate: 2% Power Indicator: Green LED Action Delay Time: 0.1s-10s Adjustable Voltage Measurement Error: ≤ 1% Power-On Delay Time: 0.5s Knob Setting Accuracy: 1% Reset Time: 1s Temperature Fluctuation Error: 0.05%C, at=20C Output: 1 x SPDT 10A/AC250VAC Minimum Switching Power: 500mW Output Relay Indication: Red LED Mechanical Life: 10000000 Electrical Life (Resistive Load): 1000000 Storage and Transportation Environment Temperature: -35℃-75℃ Installation Method: 35mm Rail Installation Protection Level: IP20 Installation Altitude: 2000 Meters Pollution Degree: 2 Wiring Capacity: 1x2.5mm2 or 2x 1.5mm2 Optional Style: M460, M265 Weight: Approx. 76g / 2.7oz Size: Approx. 90 * 18 * 64mm / 3.5 * 0.7 * 2.5in Package List: 1 * Monitoring Relay