Simple design, easy to carry and operate. ABS housing, copper test top, LED indicator screen. Conductivity test to determine the salt concentration in liquid foods. Place the probe at least 2seonds above the surface of the liquid, and the result will appear. The red light indicates the concentration of salt, green light indicates the . Item Name: Salinity Tester Battery:4xbutton battery(not included) Current: 20mA(max) Voltage: 6V Measuring Range :0.3-2.0percent (salinity) Colour:white Material:ABS Size:212 x 24.8 x 15.4mm Package Contents: 1 x salt tester Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is 1-3cm.