Specifications: Can be used for fishing/ wedding/ romantic proposal (carrying the ring), advertisement delivery, etc. 1 set of drone release and drop device air-dropping system, accessories for DJI Mavic Pro drone. Easy installation, sturdy construction, will not destroy the drone structures. Built-in rechargeable battery USB charging. High quality components, made of ABS plastic, strong, durable and lightweight. Type: Drone Delivery Device Material: ABS Compatible with: for DJI Mavic Pro Features: Easy to Install, Rechargeable, Fishing Bait Releasing, Durable Size: 10cm x 8.5cm x 5.5cm/3.94" x 3.35" x 2.17" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Drone Delivery Device 1 x Rubber Band 2 x Bandage 1 x Light Sensor Connection Cable 1 x USB Charging Cable 1 x Ring 1 Seto of Mount Stands (Others Not Included)