Shelly Plus 1 is a small form factor smart switch with potential-free contacts, which allows remote control of electric appliances through a mobile phone, tablet, PC, or home automation system.
RevK®'s ramblings: Shelly Plus 1 Mini
Shelly Plus 1 — ameriDroid
User manual Shelly Plus 1 (English - 2 pages)
Shelly Plus 1PM Mini WiFi & Bluetooth based Flush mount Relay, Power
Wiring the Shelly Plus 1 Relay - HomeTechHacker
Shelly Plus 1PM Mini Review: Size Does Matter - SmartHomeScene
What's so special about Shelly Plus (Shelly 1/1PM/2PM/i4/WS Plus) - NotEnoughTech
Shelly Plus 1 Mini - Installation video
Shelly Plus 1
Shelly Plus 1 PM Mini, shelly plus 1