Water Level Indicator 3 Levels for Pool Tank Assembled Electronic Circuit : FA902 This circuit is designed for measurement the water in a pool or tank by using led to show the water level. Power supply : 6-9V. Electric current consumption : 25mA (max.) PCB dimensions : 1.8 X 1.3 ** Free shipping Register Airmail & Need the receiver to sign of acknowledge (Except: APO AFO & PO Box.)**