If you only use them indoors you can use a turn signal holder but if you use them outdoors I don't recommend at all. The Blink mount is unreliable, and even if the device hadn't dropped on its own, anyone with a long stick could easily knock the device off the mount. So I recommend looking at one that actually screws into the case that comes with it.
Blink Outdoor Camera Wall Mount Bracket Set - 5-Pack Plastic Protective Housing and 360Β° Adjustable Mount with Blink Sync Module 2 Outlet Mount - for Enhanced Blink Outdoor Indoor Camera System (Black)
11 Review
Blink XT/XT2 Camera Wall Mount Bracket - 360Β° Adjustable for Indoor/Outdoor Use - 3 Pack
11 Review
WiFi Hidden Spy Camera with Live Feed & Video Recording - Remote Access Mini Nanny Cam | Spy Camera Wireless Hidden for Home Surveillance
11 Review
TP-LINK Tapo C310 security camera white
30 Review