1、Wireless transmission of data to avoids interference caused by complex wiring between the display and the detection module. 2、The Hall sensor is used to realize non-contact detection of current, without breaking the line, safer, reliable and convenient. 3、Voltage, current, power, temperature, capacity, percentage of remaining capacity, and running time are displayed at the same time. 4、Reserve interface for charging and discharging double relays, 5 relay working modes can realize automatic disconnection and automatic closing of charge and discharge. 5、With charge overvoltage, discharge undervoltage, charge overcurrent, discharge overcurrent protections, over temperature protections function, low temperature protections function, with buzzeralarm prompt function. 6、With power-off memory function, it can record the number of AH and WH before power-off. 7、When charging, the percentage progress bar is switched to the color running water light display, and the display screen shows the breathing light flashing effect, which enhances the prompt. 8、Chinese and English language selection, two display colors can be switched, suitable for different customer needs. This is a multi-function instrument based on 2.4G wireless data transmission technology, which can display various physical parameters such as voltage, current, power, capacity, energy, temperature, running time, etc. in real time. Battery charge and discharge management and over voltage, under voltage, over current protections accompanied by buzzer alarm. Moreover, the instrument uses a 2.4 inch color LCD as a display, which displays more comprehensive, clear and easy to observe data. Specifications: Type: with waterproof cover Input current measurement range: 0.4-300A Language: Chinese/English Screen size: 2.4in Capacity measuring range: 0-99999.9AH Energy measuring range: 0-5999.9KWH Time measuring range: 0-100H Power measuring range: 0-999KW Temperature measuring range: 0-150℃ Measurement rate: 20 times/sec Relay delay time: 0-100S Display board size: 80 * 48 * 17mm / 3.1 * 1.9 * 0.7in Measuring board size: 114 * 54 * 28mm / 4.5 * 2.1 * 1.1in Package size: 250 * 175 * 65mm / 9.8 * 6.9 * 2.6in Package weight: 411g / 0.9lb 1 * LCD Monitor 1 * Measurement Module 1 * USB Cable 1 * User Manual 3 * Connecting Line