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20 PCs per box * 10 boxes = 200 PCs per piece

measured voltage: AC 90V to AC 1000V

operating temperature:-10 to 50℃

storage Temperature:-10 to 50 ℃

operating humidity: 80%

operating power supply: No. 7 battery 2

usage: non-contact electroprobe, the whole insulation plastic seal, you are protected by safety when checking electricity, without any danger of electric shock.