Features: 1.Multifunctional Meter: The Digital multimeter panel can real-time display voltage, current, power, capacity, energy, operating hours and other physical parameters with 2.4inch color LCD; with overvoltage & overcurrent for protection for charge, undervoltage & overcurrent for protection for discharge. 2.Measurement Range: its voltage test range is for DC 6-80V(powered by itself), if offer external power supply, voltage test range is for DC 0-120V; current test range is 0-300A, capacity test range is 0-65000AH, energy test range is 0-9999KWH, for time range is 0-100hours, temperature test range is 1-100. 3. 2 Reserved Relay Interfaces: the voltmeter ammeter is equipped with two relay interfaces, which are reserved for the battery charge and discharge management and overvoltage, undervoltage, overcurrent for protection. Note: when relay control circuit 1 is ON the other is OFF and vise-versa with no way to have both ON or both OFF at the same for time. 4.Wireless Data Transmission: wireless data transmission to avoid interference with the complex wiring between the display and the detection module, while making wiring easier, transmission distance is 10 meters for single group in open space. 5.Hall Sensor: the detector gauge is equipped with hall sensor, which can achieve non-contact detection of current, without breaking the wire, more safe, reliable and convenient. Description: 18-Function in one multimeter, NCP/ COP/ OVP/ LVP/ OUT/ LCK/ BAT/ BPC/ CER/ RET/ LNG/ STI/ SFH/ DEL/ FCH/ SNR/ SNT/ RFS. (1) NCP: set the value of charge over-current for protection, with the relay can be achieved when charging over-current for protection; (2) OCP: set the discharge over-current for protection value, with the relay can be achieved when the discharge over-current for protection; (3) OVP: Set the charge overvoltage for protection value (the voltage exceeds the set voltage can automatically fill the capacity), with the relay can be filled with automatic disconnection function; (4) LVP: set the discharge over-voltage for protection value, with the relay can be achieved automatically disconnect the discharge function; (5) OUT: The switch output function of the wireless control relay can be realized by clicking OUT. (6) LCK: for key lock function, if necessary, you can lock the keys to prevent misoperation; (7) BAT: the default total battery capacity; reference value as a percentage of capacity; (8) BPC: preset remaining battery capacity percentage and remaining battery capacity; (9) CER: current return to 0 function, when the no-load current is not 0, you can click this option to clear the current; (10) RET: WH and run-time value reset function, to facilitate the next measurement; (11) LNG: language switching function, the instrument has built-in Chinese and English languages, you can switch languages through this option; (12) STI: set the relay power-on default state, open or closed; (13) SFH: device search function, through this feature can be one-to-many communication; (14) DEL: set the relay delay working for time; to achieve the for protection of the relay delay action (15) FCH: communication address modification function, if multiple groups of modules at the same for time each group of modules to set a different address to prevent interference; (16) SNR: set the screen current, when the SNR is greater than 0, and the screen for time value is not 0, you can achieve automatic screen function, and when the charging current is less than this value, the cumulative charging capacity is not to avoid floating charge The impact of the capacity value, when the current is greater than this value LCD screen automatically lit. (17) SNT: Set the screen for time value. When the SNT value is 0, the LCD panel never goes out. When the SNT value is greater than 0 and the SNR is also greater than 0, the automatic screen and bright screen functions can be realized. (18) RFS: display color switch function, this instrument has two color matching customers can choose different color according to their preferences. Technical Specifications: Voltage measurement range(self powered): 6V-80V Voltage measurement range(external power supply): 0-120V Input current measurement range: 0-300A External power supply voltage range: 6-60V Voltage measurement range: 0.01V-120V Current measurement range: 0.1A-300A Power Value: 999 KW Capacity measurement range: 0.001AH~65000.00AH Wattage measurement range: 0.000KWH~9999KWH for Time measurement range: 0~100hours Voltage accuracy: 1%+2digits Current accuracy: 2%+5digits Measuring rate: 5times/second Relay delay time: (0-60)s Communication distance: Single group 10meters in open space Over voltage for protection OVP: 0.01V-500V Low voltage for protection LVP: 0.01V-500V Discharge over current for protection OCP: 0-500A Charge over current for pro