2-unit indoor/outdoor Chamberlain intercom offers wire-free communication up to 1000 sq. ft. Waterproof design can even be used even in the shower. Offers unlimited unit expansion for a customized communication system. U.S.A. Application: Indoor or outdoor Intercom

• 2-unit wire-free intercom system
• Offers digital sound quality
• Up to a 1000-ft. range
• Waterproof design can be used in shower
• Offers unlimited unit expansion
• Always ON
• Pairs automatically with one button push
• Compatible with Chamberlain WireFree intercom Item#s 331716, add-on unit 331719 and flush-mount intercom 331727
• Up to 2-year battery life with daily use
• Batteries not included