Aevitas Watch Winder Battery Power Supply for 5 Volt Watch Winders
Battery Power Pack for Aevitas Watch Winders that run on mains power only so you can covert them into battery powered as well, handy if you want to place it in a safe of hide away somewhere with no wall socket.
Note only use if you have a 5 Volt power supply.
Seems okay and well made and presented. Good value for money.