Compatible with Phantom 3 All Series Compatible with Phantom 4, Pro & Advance Activated by the front LED lights of your drone which can easily be turned on and off using your C1 or C2 buttons on Not needed to open shell Mechanism release capable up to 2KG (check how much your drone can lift) Mirco USB Rechargable Up to 160 release in a single charge Weight less than 70 grams Mount it only with 4 screws Made in North America We are the only manufacturer in market that provide drop mechanism with 5V operated up to 2.5KG Torque as all servo require 4.8-6V to provide sufficient torque for release mechanism to work and not 3.7V Item included – 2x Circuit board – 1x Metal Gear servo – 1x 400 mah battery – 1x Sensor unit – 1x Main unit box with bracket