2 COLORS IN 1 SET: The package includes 1pc black soil moisture meter and 1pc green moisture meter for house plants, both are compact and can test soil humidity easily and quickly, enough to meet your needs SIMPLE TO READ: Large dial, ten scales with different colors. Red means dry, green means moist and blue means wet. Plug and read, responds quickly and provides easily readout. You can know the right time to water your plants accordingly EASY TO USE: Insert the probe into soil to the plant root level, and you can get the test result from the indicator pointer immediately. No Battery needed. Please wipe clean the probe with a cloth after each use GENTLE TO ROOTS: Designed with the 7.7" single probe, the plant moisture meter can keep roots intact, so that you do not dig up to much soil after each use, help you take good care of your plants INDOOR & OUTDOOR USE - The plant water meter can be used for garden, house plants, farm, yard, lawn plants, large potted plants etc. Only for soil testing, Do Not use it to test water and other liquid, and avoid very hard soil and stones