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The moisture level of soil is shown by the number of Led's, from 1 Led for low moisture level up to 4 Led's for high moisture levels. This easy to build kit is a must have for the serious gardener. Operating Voltage: 9v
220V AC TEST LIGHT
BK PRECISION 2831E BENCH DIGITAL MULTIMETER
EFK 4001 Continuity Tester
EFK 4002 Logic Probe
EFK 4003 Op-Amp Function Generator
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