1. Hall Sensor, Collects Current Without Breaking Wires; 2.4 Inches Color Screen, Displays Comprehensive Data And Diverse Styles 2. Data Acquisition Box, Wirelessly Sends Data To The Display; 3. Overvoltage, Overcurrent, Undervoltage, Overtemperature, And Low Temperature Protection; 4. Rs485 Communication Function Can Be Expanded; 5. Dual Charge And Discharge, Relay, Interface Control Description: Model: Wireless Coulomb Meter Type: 120V 300A With Display Screen Input voltage measurement range when powered by itself: 8V~120 Input current measurement range: 0.4-300A External power supply voltage: 8-120V Display language: Chinese/English Communication channel: 0-40 Display mode: 2.4-inch color LCD display Monitor power supply USB power supply: 5V Measuring range Capacity:0.000AH~99999.9 AH Energy:000.00KWH~5999.9KWH Time: 0~100 hours Power value: 000.0~999KW Temperature:0°C~150°C Protection type and setting range OVP (over voltage protection): 0.1~500V (under voltage protection): 0.1~500V OCP (charge overcurrent protection): 0.1-500A NCP (discharge overcurrent protection): 0.1-500A OTP (over temperature protection): 0-100℃ (Low Delay A Time): 0-100℃ Display board size:80x48x17(mm) Measuring plate size: 114x54x28(mm) Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:ABS+PVC Package Contents: 1x Monitor 1x Measurement Box 1x Hall Sensor (Closed By Default) 1 String x Connecting Cable 1x USB To Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.