DVB01 Range Voltage Measurement Module 0-100 V DC Digital Display Automatic Recording 24 V. Ear: 12x8 cm/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%). Size (L x W x H): approx. 67 × 44 × 20 mm / 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