You can buy it in your hobby store.
SkyTumbler - Indoor-Cage-Drone - RTF
Anleitung/ Manual (PDF Download)
The SkyTumbler rounds off the Quadrocopter range from df Models as an indoor cage drone.
The approx. 6.5 cm high model is installed in a protective cage. This cage prevents damage that can be caused by contact with obstacles (walls, etc.). The model is therefore well protected and perfectly suited for flight operations in offices, living rooms etc.. The cage also ensures that the model always straightens itself. The cage can be dismantled by experienced pilots. The model has an integrated, powerful LiPo battery and has a flight time of approx. 6-8 minutes. The model is charged with a USB charging cable included in the scope of delivery. The agility of the model is adjustable in 3 steps and therefore suitable for beginners to professionals. A flip button on the controller allows flips and rollovers to be carried out at the touch of a button. The model can also be easily flown in the dark thanks to LED lighting. Climb into wild office races and living room battles! The model is suitable from 8 years.
Scope of delivery:
Indoor Cage Drone - RTF
2.4 GHz remote control system
Integrated LiPo flight battery
USB charging cable
Flight time: 6-8 minutes
Drive: 4x Brushed
Length: 65 mm
width: 65 mm
height: 75 mm
Weight: 16 g
Recommended age: 8 years and older