EKEN V7 HD 1080P Smart WiFi Video Doorbell Camera Visual Intercom Night vision IP Door Bell Wireless Security Camera

Standard: V7 WIFI Video Doorbell

Option 2: V7 + 2 * Batteries+Charger

Option 3: V7 + Chime

Option 4: V7 + Chime + 2 * Batteries+Charger

Option 5: V7 + Wifi Extender Pro+ 2 * Batteries+Charger

Option 6: V7 + Chime + Wifi Extender Pro

Option 7: V7 + Chime + 2 * Batteries + Charger + Wifi Extender Pro

Note:

Your doorbell maybe too far away from your wireless router or you may have some obstructions in between that reduce signal strength.You might try repositioning your router or getting a signal extender/repeater for your wireless router.

Attention:

1)you can't use 18V power adapter,only use 18650 battery,Because this model no power adapter' interface.