It's probably relatively safe for humans though (be careful with your pets), the robot is 5kg, it move quite slowly and motors are nema 17 (the same than in a 3d printer) with a max gearbox ratio x20. In case of problem press the e-stop button if you have chosen to have one.
As far as I understand there are no encoder on the joints so it can't be back-driven, it's not a compliant robot.
