Why the R900®G? The R900®G meter interface unit (MIU) provides the same field-proven R900® technology for natural gas meters. The R900G MIU combines high-power, unlicensed 900 MHz, frequency-hopping, spread-spectrum technology with an easy-to-install platform to meet the performance and application requirements of any size utility. The R900G provides customers with the best life cycle value by offering high output power to maximize range and read success rate while reducing meter reading times.