Features: brand new and high quality The device has a PIR-function. When someone is approaching, it will remind you through a message or phone call, which will protect you and your family more effectively. It can be connected to WIFI, even if it is connected outdoors or through several walls, the transmission is reliable and the signal is strong. Video conversation, you can talk to visitors any for time, anywhere, through noise reduction and rate adaptation technology, you can transmit video and voice more clearly. Installation is simple, no wiring is required, remote viewing any for time and anywhere, normal movement alarm, APP real-time reminder. APP remote dialogue, two-way voice intercom, millions of high-definition, infrared night for vision, remote capture. Specifications: Material:ABS Size:Approx.15.1x6.6x3.3cm/5.94x2.6x1.3inches Color:Black+White Low-power wireless WiFi visual peephole doorbell Support 8G memory card. (8G can store 3-6 months, automatic cycle coverage) Support two 18650 batteries for power supply It can be matched with indoor Ding-Dong doorbells. This product does not contain batteries, memory cards and indoor Ding-Dong doorbells. Package Includes: 1x WiFi Wireless for Smart Doorbell Camera note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.