Combo ESD tester

Combo ESD tester
Human body synthesizes static 
1. Dual test circuit, can both test wrist strap, foot  Strap;
2. Wrist strap range:   750KΩ~10MΩ, Foot Strap range:  750KΩ~100MΩ
3. Green light mean circuit resistance is OK while red light and
    audible indicator mean the resistance is too high or too low;
4. 9V battery powered with low battery indicator;
5. Accuracy: ±5%;
6. Size: 140W*80L*40Hmm
7.18393 is tester only. 18393A is tester with stand.