Specifications:It provides 5 functions for users to choose to meet different needs.Users can set the upper and lower voltage limits.The measuring range is DC 0-100V, and the measuring accuracy is +/-0.1V.Featuring with automatic power saving function, users can set independently.All setting parameters can be saved automatically, and the setting content will not be lost after power failure.Added 0-99.9 seconds delayed close and 0-99.9 seconds delayed disconnect function.The 5 Functions are as follows:Voltage measurement: If this function is selected, the relay will not operate, and the digital tube will display the current measured voltage.Charging monitoring: when the measured voltage is lower than the lower limit voltage, the relay is closed, and higher than the upper limit voltage, the relay is disconnected.Discharge monitoring: When the measured voltage is higher than the upper limit voltage, the relay is closed, and when it is lower than the lower limit voltage, the relay is disconnected.Close in the interval: When the measured voltage is between the upper limit and the lower limit, the relay closes, otherwise the relay is disconnected.Close outside the interval: When the measured voltage is lower than the lower limit voltage, or the measured voltage is higher than the upper limit voltage, the relay closes, otherwise, the relay is disconnected. Item Name: Voltage ComparatorMaterial: Electronic ComponentsType: DVB01Work Voltage: DC 5V/12V/24V (Optional) (Should Not Exceed +/-10% of Nominal Voltage)Working Current:Working Temperature: -20-60 Degree Celsius (Limit Temperature Range:-30-70 Degree Celsius)Measuring Range: 0-99.9VLoad Capacity:Relay Normally Open Port Maximum Load Capacity: DC 0-30V/10A, AC 0-250V/10ARelay Normally Closed Port Maximum Load Capacity: DC 0-28V/10A, AC 0-125V/10AModule Voltage Input Port:1: DC+: DC Power Supply Positive2: DC-: DC Power Supply Negative3: V+: Measuring Voltage Positive4: V-: Measuring Voltage NegativeRelay Load Output Port:1: NO: Relay Normally Open Interface, Relay Suspended Before Close, Shorted with COM After Close2: COM: Relay Common Interface3: NC: Relay Normally Closed Interface, Relay Shorted with COM Before Close, Suspended After CloseFeatures: Overload Protection, Digital Display, Voltage MeasurementSize: 6.7cm x 4.4cm x 2cm/2.64" x 1.73" x 0.79" (Approx.) Notes:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:1 x Voltage Comparator