1. OF PLACEMENT: Powered by 2 x AAA batteries (not included), the humidity monitor has table stand, two magnets and wall-mountable hole on its back. You can place it on the table or any supporting plane object directly, hang it or attach it to the refrigerator or any metal . 2. WIDE APPLICATION: It can be used in bathroom, bedroom, living room, base room, greenhouse, warehouse, baby room, nursery, hatchery cellar, office and every indoor environments. 3. LOW & HIGH RECORDS: With low consumption, hight precision and stability, it can automatically record the high/max and low/min temperature & humidity in 24 hours and you can track the indoor conditions by the humidity gauge data records to a healthy home. 4. WIDE WORKING RANGE: With temperature detection range 32℉-122℉ (0℃-50℃) and humidity range 10%-99%, you can get the accurate real time temperature & humidity values to adjust your indoor air condition and environment accordingly. Power Supply:2 x AAA batteries(Not included batteries) Colour:Black Material:ABS Package Contents: 1 * circular touch hygrometer 1 * English instruction manual 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.