I've acquired this little lot of RC Helicopters & Drones. The chargers and remote controls are included..

I've tested them as far as I can. All of these items apart from one SYMA remote control start up when batteries are inserted or when they are charged.

Each remote control activates the corresponding helicopter or drone (apart from the non working SYMA).

However, it did take some time for the remotes to connect, and the helicopters suddenly burst into life after a few minutes. I suspect there may be a reason for this and I suspect there is a way of marrying each remote to its vehicle.

What I haven't done is flight tested  them.