The PCBis designed to slipinto any USB A port on a computer or laptop.There's are ATSAMD21 microcontroller on board with just enough circuitry to keep it happy. One pinof the microcontroller connects to a LED.Another pinis used as a capacitive touch input on . The SAMD21 can run for CircuitPython or for nicely- both have existing SHT4x ,and our FreeTouch capacitive touch) libraries.Over the USB connection,you can have serial,MIDl,or HID connectivity. The SHT45 has an excellent 1.0% typical relative humidity accuracy from 25 to 75% and 0.1C Ctypical accuracy from 0C to 75C. Color: Black Material: PCB Package Contents: 1 x SHT45 Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.