LED for open phase check LED: Three orange LEDs indicate U phase, V phase and W phase.
LEDs for phase sequence check: one red LED and one green LED
The strap: set on the wrist to avoid the instrument slipping from the hand.

Specifications:
Working Voltage: 60V~600V (AC, three phase)
Continuous Use Time: ≤60 minutes at 200V AC; ≤4 minutes at 600V AC
Working Frequency Range: 20Hz-400Hz
Maximum Withstand Voltage: 2000V/min (impulse voltage 4000V)
Test Leads: Double insulation
Test Length: Approx. 1meter/3.3ft
Protection : 2000V
Operating Temperature: -10℃~60℃
Size(L*W*D): 150*50*20mm/5.9*2*0.8in
Weight: 253g(approx.)

Package Includes:
1 x Tester
3 x Test Leads with Clips