ASIAIR PRO is a smart WiFi device that allows you to control Mainstream DSLR cameras.,

but some DSLR cameras have a 30-second exposure limit, which requires an external shutter release cable to ASIAIR PRO.

ZWO Shutter Release Cable is oblate and soft,  there are two types of Shutter Release Cables:

N1 (MC-30, 10PIN)
D300/ D300s/ D700 / D3/ D3s /D3x

N3 (MC-DC2, 8PIN)
D90/ D3200/ D3300/ D5000/ D5100/ D7000 Cable

Length: 1 meter