In digital technology, logic levels refer to defined ranges of electrical voltages that relate to ground (GND). For typical binary signals, two voltage ranges are allowed, known as High levels (also H levels, High, H) and Low levels (L levels, Low, L). In digital technology, information is usually represented as electrical voltages. Discrete (well-defined) and digital (countable) voltage levels are used for this purpose. Generally, the information is binary (two-valued), and thus two voltage or logic levels are required: the High level, which is the higher voltage, usually corresponds closely to the operating voltage; the Low level, as the lower voltage, is typically near 0 volts. The exact levels vary depending on the type of components used.