Feature:1. Applicable People: The wireless intercom supports dual way conversation, suitable for caregivers and patients, the elderly, residents, and the handicapped.2. Indicator Display: The intercom door bell is intelligent and humanized design, equipped with intercom light and electricity light display, clear and intuitive.3. Power Saving: Using intelligent power saving chip, which can be used for more than half a year under normal conditions after full charge.4. Louder Speaker: With large and adjustable speaker, the sound is clear, can be used as a mobile intermicrophone, suitable for ultra long distance transmission.5. Door Bell Pairing: The outer bell is paired with the inner bell by learning its code, an outer bell can be paired with 2 inner bells without interfering with each other.6. Fine Workmanship: Internal waterproof design, suitable for various environments, high gloss UV technology on the surface, for good touch of buttons.Specification:Item Type: Wireless Intercom Door BellMaterial: ABSTransmission Distance: Approx.Open Space: 100 meter / 328.1ftPartition Wall: 5-20 meter / 16.4-65.6ftApplication: Widely used in household, office, laboratory environment, medical, etc..Package List:3 x Internal Machine1 x Screwdriver1 x User Manual