Moxa's USB to Serial Hubs offer simple and cost effective serial port expansion products to attach multiple RS232 & RS422/RS485 devices to your existing USB port. Available in 1, 2, & 4 port varieties. 1 Port 2 Port 4 Port 8 Port 16 Port For dealer/reseller/quantity pricing please call our staff at 800-222-0172 or log in to the Preferred Partner Pricing Program by clicking here.