DVB01 Range Voltage Measurement Module 0-100 V DC Digital Display Automatic Recording 24 V. Ear: 12x8 cm or 4.7x3 inches Provides 5 types of features for users to choose from to meet more application needs You can set upper and lower voltage limits Measuring range 0-100 V DC, measurement accuracy ± 0,1 V You can set the automatic energy saving function All set parameters can be automatically saved, the content of the setting will not be lost in the event of power failure - Inner mesh panties Operating voltage: DC 5 V, 12 V, 24 V (nominal voltage should not exceed ± 10 percent ). Size (L x W x H): approx. 67 × 44 × 20 mm or 2.64 × 1.73 × 0.79 inch Module voltage inputs: 4-wire interface, all terminals are interface. DC : DC positive power DC-: negative DC power supply V : measurement of positive voltage electrode V-: measure negative voltage 5 types of functions: 1. Voltage measurement: select this function, the relay will not move, digital display of the current measurement voltage 2. Charging monitoring: When the measured voltage is lower than the lower limit voltage, the relay rises above the upper limit voltage, the relay is disconnected 3. Discharge monitoring: When the measured voltage is higher than the upper limit voltage, the relay pulls, below the lower limit voltage, the relay is disconnected 4. Pulling interval: when the measured voltage between the upper and lower limits, the relay pulls, otherwise the relay is switched off 5. Off-attraction break: When the measured voltage is lower than the lower limit voltage or the measured voltage is higher than the upper limit voltage, the relay attraction in other circumstances, the relay is disconnected. The package includes: 1 piece voltage measurement module with DVB01 digital display