LCD Digital Wireless Indoor/Outdoor Thermometer Hygrometer Four-channel

Features:
Display four-channel indoor outdoor temperature and humidity at the same time with ℃/℉ temperature unit for selection.
Adopt wireless technology，you can know 3 outdoor temperature and humidity in indoor receiver.
Record max/min indoor and outdoor temperature and humidity with temperature trend indication.
Alarm function of upper and lower limits of indoor and outdoor temperature and humidity.
Can be placed on the table with a bracket or hung on the wall with a hanging hole.
With 3 portable transmitter to induce 3 outdoor temperature humidity and transmit within 100m without obstacle.
Temperature humidity meter is powered by 3 * 1.5V AAA batteries or DC 5V, each transmitter is powered by 2 * 1.5V AA batteries.(Not included)