Aprilaire® Digital Humidifier Control, 7 A, 24 VAC, 10 - 50% Relative Humidity Adjustable, 3% Differential Humidity, Duct Mounting, White, 4-1/4 in W x 2-3/4 in H x 3/4 in Thick

• Designed for use with any Aprilaire humidifier requiring an On/Off signal for a 24 V circuit
• Control allows you to set the RH (relative humidity) level for your home and will control your humidifier to maintain the setting
• Terminal strip wire connection
• 4-1/2 in x 2-3/4 in hole size
• Includes-mounting screws, drywall anchors, RH setting label

• Instruction/Installation Manual https://assets.unilogcorp.com/267/ITEM/DOC/Aprilaire_65_Manual.pdf