Solar-powered soil tester, invaluable for gardeners to determine pH levels (acid/alkaline) and moisture content of the soil, as well as light intensity. Easy-to-read dial gauge and 3-way mode selector switch. 2 x 210mm long probes. Helps to prevent overwatering and root rot. Solar-powered soil tester, invaluable for gardeners to determine pH levels (acid/alkaline) and moisture content of the soil, as well as light intensity. Easy-to-read dial gauge and 3-way mode selector switch. 2 x 210mm long probes. Helps to prevent overwatering and root rot.