You can plug it into your android phone headset jack and turn it into a clickable button to take quick pictures, turn on the flashlight, record phone calls and so on via programmed short and long clicks, all without unlocking your phone.
Pretty much the same thing as the Pressy at 1/10 the cost depending on how many you buy (and who you buy from).
Anyone have one of these?
You can find these on aliexpress for approximately $5, It's also known as a klick quick button I believe.
Sounds like a bargain compared to the $27 Pressy equivalent,