Detailed Product Description Wrist strap tester1. Characteristic: Small and exquisite and light, use 9V battery; Measuring automatically, it is simple and easy to operate; 2. The wrist area tests the standard: on the low side: 750KΩ Normal: 750KΩ-10MΩ On the high side: 10MΩ 3. Precision: ±5% Product NO.: EYS4111-04833