PiRelay 8 comes with various amazing specs, one if my favorite is wireless control to the PiRelay 8 which make this PiRelay 8 Relay Board much worthy it also has 8 channel relays, Optocoupler EL357NCOn-board USB Input, Relay Selection Jumper and more and the best part is that it support all 40 pins Raspberry Pi Models and it can be used with any other hardware's like Arduino, STM32, PIC AVR, etc.

You can check more details about PiRelay 8 on Kickstarter and also you can Pre-order PiRelay 8 only on Kickstarter