DIY Supplies: Electrical Accuracy Class: 0.1 Designed to check the phase sequence. With LEDs to show if the phase is open or not, Supports Buzzer indication. Highly reliable, can check a of 60V to 600V AC three-phase. With Clips, easily involve the terminals of the control panel, guaranteeing reliability and safety. Small, light and portable, convenient for using. Operation Voltage: 60V~600V AC, three phase Limit Support Voltage: 2000V/minute (Impulse voltage 4000V) Operation Frequency Range: 20Hz~400Hz Limit Time for Continuous : 60 minutes maximum at 200V AC 4 minutes maximum at 600V AC Phase Sequence Indicator LED: Green for phase sequence, Intermittent Beep Red for reverse phase sequence, Continuous Beep Test Leads: Double insulation, Approx. 80cm cable length Yellow for U phase (L1. R) Green for V Phase (L2. S) Red for W phase (L3. ) Net Weight: 136g colour: Photo Color Material: plastic Size: 8 x 6 x 2.4cm Package Contents: 1 x 3 Phase Sequence Tester 3 x Clips 1 x Pouch 1 x User Manual Only the above package content, other products are not included. Note: Light 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.