Hey seems like a awesome Project would like to join. Have some different devices as offer

Win10
CPU: i7-4790 @ 3.60 GHz
RAM: 8 GB
GPU: GTX 1080
Browser: Chrome/Firefox/Opera

Mac Pro
MacOS Sierra 10.12.6
CPU: 2.2 GHz Intel Core i7
RAM: 16 GB @ 1600 MHz
GPU: Intel Iris Pro 1536
Browser: Chrome/Firefox/Safari

Mobile Devices
Huawei P9
Android 7.0
Browser: Chrome/Firefox

iPhone7
Browser: Chrome/Safari