SellHound listings are set up with 3 business days of handling time by default. This means that when you receive payment from your buyer they will expect you to send the item within 3 days.
You can change your handling time in the SellHound app in the Account Section > eBay Preferences.
If you want to offer a faster time, or a slower time, that is up to you. Please be sure to change your handling time in the app BEFORE you submit listings to us so the listings show buyers your specific handling time.