The SMS 310 Smart EC Monitor allows you to continuously monitor EC values directly in your aquatic environment. Features include: a user selectable set point, visual LED alarm when readings go below the set point and manual calibration. Powered by the included 12VDC adapter the meter is also supplied complete with an EC electrode. Professional and easy-to-use EC monitor. Some of the SMS 310's features include: •Large and easy to read LCD •Low Cost •Easy to Use •User Selectable Alarm set point •EC Electrode Included •Manual 1 point calibration •Visual LED alarm •Works with 12 VDC adapter •Probe with 2m cable