Small and convenient: rotary field tester with inst ent storage and port kit, small size, light weight, easy to carry.<br> Function: The testable frequency range of the rotary field measuring device, three-phase electricity meter, is from 20 Hz to 400 Hz, efficient, effective, reliable and simple.<br> Easy to use: This SP8030 phase tester has two function indicators to check the phase sequence and indicate whether the phase is open.<br> Wide Voltage Test: This gauge can detect 3-phase AC voltage from 60V to 600V with excellent performance. LED light can indicate whether the phase is on and support buzzer indication.<br> Design: Green LED shows correct phase sequence and beeps intermittently. The red LED shows the sequence reversed and beeps continuously. The tester is equipped with 3 clamp cables for your convenience.<br> Continuous use: no more than 60 minutes at 200 V ACV, no more than 4 minutes at 600 V ACV.<br> Specification:<br> Model: SM852B<br> Operating voltage: 60V ~ 600V three-phase AC voltage<br> Maximum dielectric strength: 2000V/min (voltage pulse current 4000 V)<br> Measurable frequency range: 20 Hz ~ 400 Hz<br> Meter size: 85 X 64 X 23 mm (without test lead)<br> Weight: about 200 g<br> 100%<br> Item Type: Hearing Aid Battery Tester<br> Colour: as shown<br> Material: Plastic<br> Package Contents:<br> 1 x solenoid tester kit<br> Only the above package content, other products are not included.<br> Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.