BM4200 Digital Earthing Resistance Tester 2000 Earth Lightning Meter BM4200Grounding resistance tester3 1/2 bit, maximum display: 1999Data retentionAuto RangeBattery shortage indicationGround resistance: 20 ohms: + (2%+0.1 Ohm), 200 ohm /2k: + (2%+3)Grounding voltage: 600V + (1%+5)Shape size: 151 x 102 x 59mmPower: AA1.5V x 6Weight: About 450g (not containing batteries)