I am glad I bought this payload delivery accessory. It works well and is as described in the ad. The first thing I liked was the extra height that the legs add to the drone. This is a great convenience when landing or taking off on uneven ground. The system is ready to go when you flip the switch and see the green light before launch. The actual triggering takes place via the existing light remote control. It launches a version that drops exactly 1 pound payload. We put him to the test by trusting him to send car keys back and forth across the large campsite and were delighted to see it delivered exactly where we wanted it to be. This is a very handy accessory for my drone that I will always have on hand and ready to use.