The Adafruit INA219 FeatherWing also includes a precision amplifier that measures the voltage across the 0.1Ω, 1% sense resistor. Since the amplifier's maximum input difference is ±320mV, this means it can measure up to ±3.2A. With the internal 12-bit ADC, the resolution at ±3.2A range is 0.8mA. With the internal gain set at the minimum of div-8, the max current is ±400mA, and the resolution is 0.1mA. Advanced hackers can remove the 0.1Ω current sense resistor and replace it to change the range, for example a 0.01Ω to measure up 32A with a resolution of 8mA.