Simple design, easy to carry and operate. ABS housing, copper test tip, LED indicator screen. Conductivity test method to determine the salt concentration in liquid foods. Place the probe at least 2 seconds above the surface of the liquid, and the result will appear. The red light indicates the concentration of salt; green light indicates power. Item Name: Salinity Tester Battery: 4 x button battery (not included) Current: 20mA (max) Voltage: 6V Measuring Range: 0.3-2.0% (salinity) Color: 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 cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.