This product is a high accuracy temperature and humidity sensor used in home conditions.This is a powerful sister version of  Grove - Temperature and Humidity Sensor. It consists of a capacitive sensor element used for measuring relative humidity and a negative temperature coefficient (NTC) thermistor used for measuring temperature. Every sensor was calibrated in an accurate humidity room. Small dimension, ultra low power consumption, more than 20m's signal transmission distance make it a good selection for various application environment. Different from Twig - Temp&Humi Sensor v0.9b, the accuracy of this module can gets up to 0.3 degree in temperature and 2% in relative humidity.