The powerful Honeywell Home RedLINK® Room Sensors have a wireless, 200-feet range that's designed to sense indoor temperature, humidity and motion. The sensors transmit through most building materials to the T10 thermostat. They are quick and easy to install.
Honeywell Home RedLINK 3.0 Indoor Room Sensor, 0 to 120 deg F, 5 to 95 % Humidity Rating, Wall Mounting, 24 V, 3 VA Power Consumption, White, 2.6 in H x 2.6 in W, For Use With: THX3210WF T10+ Pro Smart Thermostat with RedLINK®