Plastic holed is 4 holes, one in each corner. Double sided tape is applied to the rear of the sign for fixing. Photoluminescent signs glow in the dark. Photoluminescence is a special kind of luminescence.
eBay
Door Viewer Camera 5G Dual Band WiFi Wide Angle Lens APP Control Door Eye Hole Camera 100‑240V Motion Detection Alarm for Home
Aliexpress UK
Hole-on Ex Make & Shoot Pinhole Camera Kit. never out of wrapper.
eBay
Geniuspy HD 5MP Fisheye Peephole POE IP Camera Audio Mini Door Eye Hole Camera P2P Network Surveillance Camera Security Seeasy
Aliexpress UK
Lens Angle: 150°. Sturdy Lens: The product shell is made of aluminum alloy, and the lens lens is also reinforced with hard glass, which can avoid intentional destruction by human beings. Material: Aluminum, Glass.
eBay
Two-Way Articulation Borescope 1080P HD Steerable Endoscope Camera For Wall Engine Hole Camera Support IOS Android
Aliexpress UK
80 x 16 x 24 x 34mm / 3.15 x 0.63 x 0.94 x 1.34in. Feature: 1. WiFi Version: 5.0GHz/2.4GHz (Both Compatible). Lens Angle: 220°. Night : Supported. Charging Port: Micro USB. If you do not receive our reply within 48 hours, pls.
eBay
Large-format 4x5 Camera Small Hole Imaging Shooting Processing Camera Outdoor Indoor Integrated Camera
Aliexpress UK
We also provide a UK based after-sales technical support. Steel Drill Hole Saw choose from 16.5mm 18.3mm, 18.5mm, 21mm and 22.5mm. HGVs Reversing Turning Left Right British Speaker Voice Warning Caution Alarm.
eBay
1080P Mini Wifi Door Eye Camera Hole Wide Angle FishEye Lens 1.66mm Peephole CCTV Network Audio Horn P2P Onvif Tuya
Aliexpress UK
eBay
Universal Baby Monitor Holder Longer White Flexible Silicon Baby Camera Stand, Ideal IP Camera Mount Hole-Free Crib Cradle Rod
Aliexpress UK
Use your cell phone to view the crowd outside the door to guard your safety. WiFi Version: 5.0GHZ. Lens Angle: 170°. Recording: Support. Charging Port: Micro USB. Storage: Cloud, Built in Storage.
eBay
QILENS CCTV Lens M7 6mm for Security 720P 1080P HD Mini Camera Pin hole Lens
Aliexpress UK
LCD Resolution: 320 240p. Peephole Size: φ5.8 1.3cm/φ2.28 0.51in. Peephole Weight: 27g/0.94oz. The screen supports power display. In power-on mode, you can press "power key" to takes photo too. Host Size: 12.7 6.9 1.8cm/5 2.71 0.70in.
eBay
Flexible Baby Monitor Holder for Crib Baby Camera Mount Bending Winding IP Camera Stand Hole-Free Without Tools or Wall Damage
Aliexpress UK