6, H2 is rich in hydrogen 0-2400 PPB
7. SG Saltwater specific 1.000-1.222
8. Temperature: 0-60.
9. Fertility of fertility 0-3
10, Resistance Ratio: 50-20
Package Contents
1*10 1 ph meter
1 x English manual.
3*ph Buffer Power
1 x orp buffer power