Standard interface can be directly connected with microcontrollers. Red working status indicator lights are conducive to the safe use. Widely used for all MCU control, industrial sector, PLC control, smart home control. Specifications: Working voltage: 5V, channel: 8 channel, item size: 13.4 * 5.3 * 1.7cm / 5.28 * 2.09 * 0.67in, item weight: 116g / 4.11oz, package weight: 118g / 4.17oz