Smart Battery Monitor 1.8in Color LCD Display Waterproof Battery Volt Meter for Acid Lithium Iron 50A 10‑100V Item Type: Smart Battery Monitor Material: ABS, Stainless Steel, Silicone Screen Size: 1.8 inches Sampling Method: Shunt Voltage Testing Range: 10-100V Voltage Resolution: 0.01V Current Measurement Range: 0-50A Current Resolution: 0.001A Capacity Display Range: 0% to 100 percent Power Measurement Range: 0-5KW Power Resolution: 0.01W Ampere-hour Measurement Range: 0-9999AH Capacity Resolution: 0.1AH BT Communication Distance: Up to 10 meters without obstacles Voltage Accuracy: ±1%+2 digits Current Accuracy: ±2%+0.002A Display Power Consumption: 0.75W Screen Off Time: During charging, screen off after 20 seconds; during discharging, screen on when current ≥15mA, screen off when current <15mA and >20s