Tomahawk DT1 Neighborhood Cat Drop Trap is tripped by tying a piece of string to the front and pulling when the target cat enters the trap and is comfortable.
Please view this video HERE by Tomahawk Live Trap that can help with setting up and triggering the trap.
The Tomahawk DT1 Neighborhood Cat Drop Trap does not come with remote control trigger, this would be purchased separately however, the Tomahawk Remote Control Drop Trap Trigger with Prop and Attachment Bracket (DTRC100) that was compatible with the DT1 Cat Drop Trap has been discontinued by the manufacturer.