The StarLPRO is a new, low-cost and smart rubidium oscillator compatible with the Datum-LPRO package. It replaces and is fully compatible with the former Spectratime LPRO model. The StatLPRO allows customers to reduce their cost and seamlessly upgrade deployed systems with aging Datum LPRO oscillators, while using the smart features of the StarLPRO to achieve higher performance and reliability and extended lifetime.