Usage Tips:BNC connector, suitable for most pH and controller BNC connectors Application: Suitable for a wide range of aquariums, hydroponics, laboratories and others Response time:less than equal 1min Operating temperature:0℃-60℃ Temperature (ºC):0℃-50℃ Connection form:Low-noise cable leads directly. Zero potentiometer (PH):7±1 PH range:0-14 error (mV):less than equal 15 Internal resistanceMohm(25℃):less than equal 250 Theoretical percentage slope%: equal 97 Terminal Blocks:BNC plug The repeatability (pH):less than equal 0.017 Tips:The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Colour:As Shown Material:Plastic Package Contents: 1 * Electrode Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.