Pointells Wireless doorbell chime with intercom and voicemail system

Description

Specifications: Outdoor Unit: Use 3*AA batteries(batteries NOT included) Sound Volume:90-100dB Visitor can listen Host's message if he/she isn't at home. Also Visitor can leave message to Host Recording time can be up to 4 minutes Indoor Unit: Use 3*AA batteries(batteries NOT included) Sound Volume:90-100dB Answer calling from outdoor Host can listen visitors' message inside room if there is Features: Remote Range:1000-1300 Feet (depends on the house) Advanced digital technology,strong anti-interference Working Frequency:315MHz,or 433MHz Host can talk with Visitor firstly before opening the door Host can leave message to Visitor while not at home Visitor can leave message to Host if he/she is not at home Whats in the Box: Outdoor intercom Indoor intercom Mounting screws Instructions