RioRand DC-DC Converter Module Step up and down In 3.5-28V Out 1.25-26V Adjustable (LM2596S+LM2577S) Powered by RioRand advanced technology Using ICs: LM2596S+LM2577S Input: 3.5-28V, rate amperage 1A, max 3A Output: 1.25V-26V, rate amperage 1A, max 3A