Features 1、The product quality and durability are very good, the power consumption is very low, used in battery‑powered equipment. 2、Metal oxide sensor is used to monitor indoor air quality, built‑in 8‑bit MCU to execute the first level algorithm. 3、Integrated 12‑bit for sensor reading and digital conversion, I2C interface can be directly connected to the host system. 4、Darlington transistor arrays module installation is simple, which not require particularly complicated operations. 5、No extral step is required, transistor arrays module's quality is guaranteed, you can use it with confidence. Specification Item Type: Darlington transistor arrays module Model: ULN2803A Output Voltage: 50V Rated Current Collector: 500mA Color: Purple Package List 2 x Darlington Transistor Arrays Module