You can view it on your cell phone or monitor. ABOUT WIRING: The monitor to doorbell need wired with 4 wires. You can extend the distance with 4-core wire. You can connect all 12V electronic locks.
eBay
Lenovo 4MP HD Security IP Camera 5G WiFi Surveillance Camera Dual Lens 5X Zoom AI Tracking Home Indoor CCTV Camera Baby Monitor
Aliexpress UK
Hikvision DS-KH8350-WTE1 PoE WiFi 7" Indoor Station Monitor IP Video Intercom. Hikvision DS-KIS603-P(C) IP Video Intercom Kit WiFi POE Doorbell Door Station. Hikvision WiFi POE IP Video Intercom Kit DS-KIS603-P(C) Doorbell Door Station UK.
eBay
Vstarcam 3MP HD Wireless WiFi IP Camera Surveillance CCTV Camera 1080P Home Security IR Night Vision PTZ Baby Monitor Camera
Aliexpress UK
Item Type: Video Doorbell Intercom System. [MULTIPLE FUNCTION] : Support intercom without handheld, electric unlocking function, which can help you to observe the outdoor, and with mutual intercom function and non disturbance function.
eBay
HD Mini Camera Wifi Wireless Dual Lens 8MP IP Cameras Smart Night Vision CCTV Security V380 Pro PTZ Camara Indoor Baby Monitor
Aliexpress UK
No WIFI visual doorbell, more secure information. Doorbell ultra-low power consumption, long standby. Install the doorbell in the doorway where it is convenient to remind, you can choose the base fixing or film sticking fixing, also can be used together.
eBay
5 inch Video Baby Monitor with Two Camera and Audio, Night Vision, 4X Zoom, 1000ft Range 2-Way Audio Temperature Sensor Lullaby
Aliexpress UK
Doorbell can connect the most electronic lock. This video door phone is a 4 wire intercom system, you need to connect 4 wire cable between indoor monitor and outdoor doorbell. You can see who is outside, you can talk to the people outside, open the lock.
eBay
Professional UHF Wireless Lavalier Microphone with Audio Monitor Function Mic 2 Channels 80m Range for DSLR Cameras Interview
Aliexpress UK
Intercom Monitor. Hands-free colour monitor with3.5" high resolution LCD display for Simple Bus 2 system. For Simple Bus 2 System. This monitor is sold by the manufacturer without a mounting bracket and requires a mounting bracket art. 6786.
eBay
3.5 Inch Wireless Video Baby Monitor Mother Kids Two-way Audio Baby Nanny Security Camera Night Vision Temperature Monitoring
Aliexpress UK
Smart Doorbell Long-Range Wireless USB Doorbell 150M range waterproof design -. No WIFI video doorbell, information is more secure. Doorbell ultra-low power consumption, long standby. Video two-way intercom.
eBay
Vstarcam 5MP IP Camera 2.4G/5G WiFi Baby Monitor Security Protection Indoor Video Surveillance Auto Tracking Smart Home Pet Cam
Aliexpress UK
【Easy to Install & Work】Installing the wireless video doorbell no subscription is hassle-free. Just connect the doorbell and monitor via 2.4G Bluetooth. NO subscription, NO monthly fee, NO WiFi or APP required.
eBay
IMILAB C22 3K IP Indoor Camera Detection Color Night Vision Monitor for Baby/Pet 2-Way Audio Wi-Fi6 Powerful AI Algorithm White
Aliexpress UK