Power Options:1. Can be powered by a power adapter (included) when connecting the doorbell with WiFi. 2. Can be powered by a power adapter (included) when connecting with an Ethernet cable and PoE splitter. 3. Can be powered by a PoE switch when connecting with an Ethernet cable. You can choose the suitable according to the installation distance and network signal strength. Either way, the data transmission is guaranteed to be stable.Can be connected to all 12V electronic locks of fence gates or front doors. This video doorbell sets is perfect for home, apartment and business front door. Network:2.4G WiFi 802.11 b/g or wired network Power adapter :DC 12~36V AC 8~24V or 12~15V or 48V POE Function:Full duplex talk,Takephoto,Take ,Unlock Unlock:Unlock by remote control, ID Card or APP External memory: Micro-SD card up to 256GB Resolution:2Mega pixels View angle:140 Horizontal angle Night vision:IR CUT no color deviation, B/W night vision Alarm message:Push picture to APP when motion detection or call Playback :Video recording after the call or motion detection Wire-free or wired connection (3 types of connection) Due to different product batches, the appearance may be different, which does not affect use. Material: plastic+metal colour: As shown Package Contents: 1 x Doorbell 7 x RFID Card 1 x Ding 1 x 32G card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.