Feature: 1. The DC digital display current smart meter can be used for the measurement and display of a single current in the electrical circuit, and can be attached with a relay alarm output 2. Can set upper and lower limit alarm, alarm delay, alarm return difference, with current real‑time monitoring and alarm output function 3. The ammeter has overload protection function which can better protect the circuit 4. The product adopts Hall sensor which can make sure the transmission and stability of signs 5. Adopted of high quality electronic components, and accuracy process, ensure for the durability Specification: Item Type: Digital Display Ammeter Material: Plastic Model: SZD07 Input Voltage: DC8-35v Measurement Type: DC current Range: 0.3-50A Sensor: Hall sensor Sensor Input Current: 25A Sensor Output Voltage: 2.5±0.625V Sampling Frequency: 2 times/s Alarm Output: Upper and lower limit alarms are output from the same relay Contact Capacity: 6A/250VAC, 6A/30VBC, resistive load Working Environment: Non-corrosive occasions with temperature -10~50℃, temperature <85%RH Accuracy Level: 0.5 level . Package List: 1 x Digital Display Ammeter1 x Sensor1 x English User Manual Note: 1. Before powering on, please reconfirm whether the auxiliary power supply, input signal and wiring of the instrument are correct.(The corresponding value of the auxiliary power supply must match, otherwise the instrument will be burnt out)2. To monitor a single current, the transformer can not run through multiple routes at the same time, which will affect the measurement results.3. Contact capacity: 6A/250VAC, 6A/30VDC