Designed to hold Celestron remote, AUX splitter, USB hub, and battery pack.

USB Hub- https://www.amazon.com/AUKEY-Powered-Charging-Adapter-Switch/dp/B01IDI9YFW/ref=sr_1_19?crid=1ZFBNXMPLLBKR&dchild=1&keywords=aukey+usb+c+hub&qid=1597100494&sprefix=aukey+usb%2Caps%2C147&sr=8-19

Battery Pack- https://www.amazon.com/TalentCell-Rechargeable-12000mAh-Multi-led-indicator/dp/B00ME3ZH7C/ref=sr_1_3?dchild=1&keywords=battery+pack+12v&qid=1597100560&sr=8-3