ActronAir QUE Zone Controller in Black mounts inside the zone and provides direct individual zone temperature control and on/off operation without returning to the master controller, with wired or wireless operation via RF (915MHz) and more than 2 years battery life on 4 x AAA batteries. Over-The-Air updates via Wi-Fi keep the controller current, and zone blade and battery indicators confirm operational status at a glance. Low voltage inputs only — connecting 240VAC will damage equipment and void your ActronAir warranty.