ITEM NAME:2pcs DHT11 Temperature Humidity Monitor Shield Sensor Wifi Module Adapter B F8L8 2pcs DHT11 Temperature Humidity Monitor Shield Sensor Wifi Module Adapter B F8L8 The item only contains DHT11 temperature humidity wifi module adapter board DHT11 master: ESP-01 / ESP-01S ( not include) Temperature and humidity sensor: DHT11 Operating voltage: DC 3.7 V-12 V (support 3.7 v lithium battery power supply) Measurement accuracy: Temperature: +/- 2 Celsius Humidity +/- 5% relative humdity colour: blue Material: plastic Package Contents: 2*ESP8266 DHT11 Temperature Humidity Wifi Module Only the above package content, other products are not included. Note: Light shooting 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..The item only contains DHT11 temperature humidity wifi module adapter board. DHT11 master: ESP-01 / ESP-01S ( not include). Temperature and humidity sensor: DHT11.