Decription: Features: 1. Measures soil moisture levels by capacitive sensing. 2. Insert it into soil and impress your friends with the real-time soil moisture data. 3. Built-in voltage regulator chip, supports a 3.3 wide voltage operating environment. 4. A miniature PC such as the Raspberry Pi only needs an external ADC (analog signal to digital signal) conversion module to work. Specifications: Working voltage: 3.3 VDC Output voltage: 0 ~ 3.0 VDC Interface: PH2.54-3P 98 x 23mm (LxW) Included: 1 x module 1 x cable