Bluetooth Problem

The bluetooth support two devices, but does not work fine. When I try to connect two bluetooth devices sometimes it doesn't work well, and even when it does, occasionally the bluetooth goes down and back after two or three seconds. For example I want to connect a bluetooth headset and a bluetooth keyboard, and if I try to connect the keyboard and only then the headset or a speaker, it doesn't work. When I first plug in the headset and then the keyboard, every 30 seconds or so there is a "break" in bluetooth and I stop listening to music for 2 or 3 seconds and the keyboard also stops working at the same time.