We have 3 for the Mavic 1 (Pro)1. The original single release electric Gannet activated from the C1/C2 buttons on your remote. Drop anything at any distance2. The Dual release, same but can drop 2 separate loads3. The New Mechanical Gannet Sport for fishing only as it needs the line to activate the release.Max lift with the M1 is 750g max safe bait load is 450g