【Wireless Voice Intercom Doorbells】: Wireless voice doorbell, talk to visitors via two-way voice intercom, know who is visiting your home and talk to them. Large adjustable speaker, clear voice, can be used as an intercom mobile, it can also be used as a nursing device for the elderly or patients. 【Easy Installation】: Directly stick to the wall with adhesive tape. Pair of outdoor doorbell with indoor doorbell by learning its code, 1 outdoor doorbell can be associated with N indoor doorbells and without interference. Frequency Use of this product complies with national regulations and will not cause harmful electromagnetic interference, and two voice intercoms should not be within 1m or there will be noise interference. 【Long Wireless Range】: The signal transmission is stable and stable. You can install it inside, outside door frames or anywhere. where in the garden. 【Low Power Consumption】: Long standby time for outdoor buzzer up to six months. Outdoor-bell is powered by 4 AAA batteries (not included), easy to replace the battery. The inner bell is used with a data cable External USB. Can be widely used in homes, villas, offices or business places. 【You Will Get】: 1*outdoor doorbell, 1*indoor doorbell, 1 x manual, 1 x screwdriver, 2 x sticker. If you have any questions, please do not hesitate to contact us, we guarantee that we will give you 100% satisfaction.