Features: 1.[Two Way Talk] The wireless intercom doorbell supports two way talk for easy access to visitors, letting you know who is visiting your house and talking to them, and letting them know you are coming or waiting. 2.[Large Range] Wireless doorbell set with 1 outdoor receiver and 1 indoor transmitter to talk in a large range through wireless connection. 200m range without obstacles, 5 to 50m with obstacles. 3.[Clear Sound] Wireless voice doorbell can transmit signal stably to make the sound clear. It won't be affected by WiFi interference and won't interfere with your other smart devices. 4.[Application Scenario] This wireless intercom doorbell can be widely used in offices and homes to know who is outside, which is very practical for the elderly who need more time to open the door. 5.[Easy To Use] Easy to install and use, visitors press the outdoor doorbell and get the bell, just press the button on the handset to connect, then long press to talk and release when finished. specification:Item Type: Wireless Intercom Doorbell Material: ABS Wireless Distance: Approx. 200m/656ft (Without Any Obstacle), Approx. 5-50m / 16.4-164ft (With Obstacle) Indoor Transmitter with Battery Type: Built in 890mAh Lithium Ion Battery Outdoor Receiver with Battery Type: 3 x AA Batteries (Not Included) PackageList: 1 x Transmitter 1 x Transmitter Base 1 x Receiver (Battery Not Included) 1 x Data Cable 1 x Screwdriver 2 x Double Sided Sticker 1 x Instruction Manual