JKtrax1

I have a USB-1616HS-2 that I am using to collect data and would like to use the digital outputs to control power relays that operate various relays. The spec sheet states output high is >2.0V (I'm measuring 2.5 to 3.3, pending on what channel) and 1.0mA per pin. This device has the TR-2U power supply attached. How do I go about converting this low voltage/low amp signal to something larger that can operate a relay that require 10-15ma and 5+ VDC. This is definitely not my area of expertise, so bear with me if the answer is simple. Appreciate your time.