Doorbell product size (mm) : 91x52.5X26mm. Voice intercom :3m. The doorbell base should be fixed on the wall, door, etc. The purpose of the film is to fix the doorbell base, if the screws can be drilled, the installation will be more secure than the film.
eBay
IP Wifi Camera 2.8mm Video Surveillance Indoor Home CCTV Video Camara Two Way Audio Security Protection CamHi CamHipro Wi-Fi Cam
Aliexpress UK
IeGeek Bell J1. 100% Wireless & 3-Minute Setup: Enjoy easy installation with the long-lasting battery and Wi-Fi connectivity (Only 2.4GHz). No wires, no hassle—get it up and running in just minutes.
eBay
5 Inch Video Baby Monitor With Pan Tilt Camera 2.4G Mother Kids Surveillance PTZ Video Cams Temperture Display Home Security Cam
Aliexpress UK
1 WiFi Doorbell 1 Manual 1 USB jingle. Horizontal Resolution: 1080P. Wireless connection: WIFI IEEE802.11b/g/n 2.4GHz,rf433MHz. Weather resistant, safe for outdoor use. battery capacity：1000mAh.
eBay
IP Camera WiFi 4MP Outdoor Home Security Video Surveillance Video Wi Fi Camara HD 1080P Wireless Wi-Fi Audio Record CamHi Cam
Aliexpress UK
Note: The jingle is powered on, but the doorbell doesn't ring. Dial the jingle first and then plug it in. Press the function key on the jingle to see that the prompt light is flashing. Press the doorbell, and when the doorbell rings, the pairing is successful.
eBay
IP Wifi Camera 2.8mm Video Surveillance Indoor Home CCTV Video Camara Two Way Audio Security Protection CamHi CamHipro Wi-Fi Cam
Aliexpress UK
！！The price of the doorbell does not include the Dingdong machine and battery USB cable. PIR Motion Detection - Automatically send alert to your phone when it detects any suspicious motion or the doorbell be pressed.
eBay
5'' Video Baby Monitor 2.4G Mother Kids Night Vision Zoom PTZ Video Surveillance Cameras With Temperature display Screen ABM501
Aliexpress UK
And identifying strangers. And it provides the wired option that you will have no worries about battery life. 1 Doorbell Receiver. Other Functions: Alarm, 2-way Audio on the phone APP, Remote wake up/PIR wake up.
eBay
IP wifi video doorbell camera intercom system 1080p HD wireless IR RFID Electric lock home security audio video door phone kit
Aliexpress UK
Compatible with Alexa and Google Assistant. IK-V1X Smart HD Video Doorbell supports Alexa and Google assistant Visual functions. IK-V1X Smart HD Video Doorbell is powerful and includes long lasting large capacity 9000 MAH high Performance Batteries.
eBay
Includes: Video Doorbell E340 (Battery Powered), Floodlight Camera E340, HomeBase S380 (HomeBase 3). Video Doorbell E340 (Battery Powered): Dual Cameras, Double Security; Color Night Vision for a Clear View; See What Matters in 2K Full HD Clarity;...
eufy UK
No need for professional installer, just a screwdriver and an electric drill to install the wireless doorbell in five minutes. (3M double-sided tape can also be used as an alternative to not drilling) Works with 2.4Ghz WiFi, you can sync and run on ieGeek app in minutes.
eBay
Awapow 3.5 Inch Doorbell Peephole Viewer Digital Door Camera 120° LCD 2 Million HD Pixels Cat Eye Door Bell Outdoor Monitor
Aliexpress UK