Two Syma S33 helicopters. Both working but the transmitter I believe is from the drone not the actual helicopter as I got it 2nd hand. You can fly up to 1m and control them but they are not going any higher than this. I have checked and the Syma transmitter has a drone picture on screen instead of a helicopter, hence I know it is not for helicopters. You can still connect both helicopters and both are working, but they are limited from what I can see.The 2nd option is old berries. But I'm unable to check this, unfortunately. They are charging ok and you can fly, as it says, a few minutes.I was trying to get a transmitter for helicopters, but couldn't find it anywhere online.