The environment sensor pack includes the MOTHERBOARD, DIGITISER and SENSOR ARRAY. With these 3 boards, you can capture data from your environment, display values on a seven-segment display and even log the data on an SD card. The SENSOR ARRAY can measure temperature, relative humidity, light and sound levels. The MOTHERBOARD has a built-in real-time clock module that keeps time even when unplugged. The DIGITISER can display 4 digits or characters and includes 2 buttons and a potentiometer to let you control what’s being displayed, or the brightness of the display. You get to program the MOTHERBOARD, so you decide how your device functions. Each kit comes with a 40+ page pdf manual.